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1
Baba, Gar Yusuf. "The Metamorphosis of Performance: Oral Heritage and Medial Transformation in Kanywood Video Films". Doctoral thesis, Humboldt-Universität zu Berlin, 2020. http://dx.doi.org/10.18452/21532.
Streszczenie:
Die Studie definiert und analysiert Kanywood-Videofilme kritisch, wobei ein besonderer Schwerpunkt auf Quellen der mündlichen Literatur und Performancepraxis liegt. Per Definition steht Kanywood sowohl für Filmindustrie als auch für in Nordnigeria produzierten Videofilme. Die Studie hält an "Kanywood" als dem für die Branche geprägten Label fest. Der Literaturüberblick zeigt, dass die Aneignung von Bollywood-Filmmustern durch Kanywood-Filmemacher übermäßig untersucht wurde. Bisherige Untersuchungen im Bereich des re-enactment oraler Hausa-Performance in Kanywood-Videofilmen sind hingegen unzureichend. Die vorliegende Studie füllt mit ihrer Untersuchung der Transformation der Hausa-Kultur im Medium Film aufgrund der Globalisierung und im Kontext traditioneller Performance-Künste diese Lücke, und fügt so den bestehenden Arbeiten über Kanywood eine innovative Forschungsperspektive hinzu.
Im theoretischen Rahmen von Performance Studies und mit der gründlichen Analyse eines ausgewählten Korpus zeigt die Studie, wie der Videofilm als Medium wichtiger sozialer und kultureller Veränderungen gesehen wird. Er ist nicht nur ein Gegenstand anhand dessen die Erforschung des Konzepts einer transzendierenden Globalisierung möglich ist, sondern auch ein Weg, um zu verstehen, wie die Gesellschaft sich unter bestimmten sich wandelnden Umständen verändert. Während die allgemein zugrunde liegende Frage lautet, ob Kultur statisch ist oder nicht, verhandelt die Studie dabei die spezifischen Fragen, inwiefern Performances während des Filmemachens neu inszeniert und neu gerahmt werden, und inwieweit traditionell kodierte Performance-Ereignisse im Videofilm verändert, subvertiert und/oder bereichert werden.
Die Studie empfiehlt die Ästhetik von Filmsprache als ein Gebiet weiterführender Forschung, stellt heraus, dass Imitation, Adaptation und Aneignung zirkulierender künstlerischer Formen ein globale Phänomene sind, die auf Intertextualität beruhen, erklärt, dass Kultur nicht statisch, sondern dynamisch ist, und kommt zu dem Schluss, dass es angemessener ist, Videofilme und Filmemacher durch das Paradigma der kulturellen Hybridität und Modernisierung zu betrachten, da sie die kulturelle Verschiebung, Transformation und Veränderung im Zeitalter der Globalisierung fördern.The study identifies and critically analyses Kanywood video films with particular emphasis on sources in oral literature and performance practices. By way of definition, Kanywood stands for both the film industry and video films produced in northern Nigeria. The study sticks to “Kanywood” as the label coined for the industry. However, “Kannywood” with the consonant cluster, as in Hollywood, Bollywood and Nollywood is a variant label, which some scholars have adopted. The study forgrounds that Kanywood filmmakers' appropriation of Bollywood have been excessively explored. But investigations in the area of re-enactment of performance in Kanywood video films are conceivably insufficiently undertaken. Therefore, the distinct contribution of this study reflects on transformation of Hausa culture due to globalization, thus elaborating the existing works on Kanywood. Through a performance framework and a thorough analysis of selected corpus, the study shows how video film is seen as a provider of major social and cultural changes. It is not only a means through which an exploration of the concept of the transcending globalization is possible, but it is also a way of comprehending how the society transforms under some changing circumstances. While the general underlying question is whether or not culture is static, the study thereby negotiates specific questions such as how are performances re-enacted and re-framed during filmmaking process, and how far are traditionally encoded performance events altered, changed, subverted or enriched in video film? The study recommends the aesthetics of language as an area of further research, foregrounds that imitation, adaptation and appropriation of circulating artistic forms is a global phenomenon grounded in intertextuality, expounds that culture is not fixed but dynamic, and concludes that it is more appropriate to look at the video films and the filmmakers through the paradigm of cultural hybridity and modernization which enhance cultural shift, transformation and change in this era of globalization. Keywords: Kanywood, performance, oral heritage, transformation The study identifies and critically analyses Kanywood video films with particular emphasis on sources in oral literature and performance practices. By way of definition, Kanywood stands for both the film industry and video films produced in northern Nigeria. The study sticks to “Kanywood” as the label coined for the industry. However, “Kannywood” with the consonant cluster, as in Hollywood, Bollywood and Nollywood is a variant label, which some scholars have adopted. The study forgrounds that Kanywood filmmakers' appropriation of Bollywood have been excessively explored. But investigations in the area of re-enactment of performance in Kanywood video films are conceivably insufficiently undertaken. Therefore, the distinct contribution of this study reflects on transformation of Hausa culture due to globalization, thus elaborating the existing works on Kanywood. Through a performance framework and a thorough analysis of selected corpus, the study shows how video film is seen as a provider of major social and cultural changes. It is not only a means through which an exploration of the concept of the transcending globalization is possible, but it is also a way of comprehending how the society transforms under some changing circumstances. While the general underlying question is whether or not culture is static, the study thereby negotiates specific questions such as how are performances re-enacted and re-framed during filmmaking process, and how far are traditionally encoded performance events altered, changed, subverted or enriched in video film? The study recommends the aesthetics of language as an area of further research, foregrounds that imitation, adaptation and appropriation of circulating artistic forms is a global phenomenon grounded in intertextuality, expounds that culture is not fixed but dynamic, and concludes that it is more appropriate to look at the video films and the filmmakers through the paradigm of cultural hybridity and modernization which enhance cultural shift, transformation and change in this era of globalization. Keywords: Kanywood, performance, oral heritage, transformation The study identifies and critically analyses Kanywood Video films with particular emphasis on sources in oral literature and performance practices. By way of definition, Kanywood stands for both the film industry and video films produced in northern Nigeria. The study sticks to "Kanywood" as the label coined for the industry. However, "Kannywood" with the consonant cluster, as in Hollywood, Bollywood and Nollywood is a variant label, which some scholars have adopted. The study foregrounds that Kanywood filmmakers' appropriation of Bollywood have been excessively explored. But investigations in the area of re-enactment of performance in Kanywood video films are conceivably insufficiently undertaken. Therefore, the distinct contribution of this reflects on transformation of Hausa culture due to globalization, thus elaborating the existing works on Kanywood. Through a performance framework and a thorough analysis of selected corpus, the study shows how video film is seen as a provider of major social and cultural changes. It is not only a means through which an exploration of the concept of the transcending globalization is possible, but it is also a way of comprehending how the society transforms under some changing circumstances. While the general underlying question is whether or not culture is static, the study thereby negotiates specific questions such as how are performances re-enacted and re-framed during filmmaking process, and how far are traditionally encoded performance events altered, changed, subverted or enriched in video film? The study recommends the aesthetics of language as an area of further research, foregrounds that imitation, adaptation and appropriation of circulating artistic forms is a global phenomenon grounded in intertextuality, expounds that culture is not fixed but dynamic, and concludes that it is more appropriate to look at the video films and the filmmakers through the paradigm of cultural hybridity and modernization which enhance cultural shift, transformation and change in this era of globalization.
2
Halbach, Till. "Error-robust coding and transformation of compressed hybered hybrid video streams for packet-switched wireless networks". Doctoral thesis, Norwegian University of Science and Technology, Faculty of Information Technology, Mathematics and Electrical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-136.
Streszczenie:
This dissertation considers packet-switched wireless networks for transmission of variable-rate layered hybrid video streams. Target applications are video streaming and broadcasting services. The work can be divided into two main parts.
In the first part, a novel quality-scalable scheme based on coefficient refinement and encoder quality constraints is developed as a possible extension to the video coding standard H.264. After a technical introduction to the coding tools of H.264 with the main focus on error resilience features, various quality scalability schemes in previous research are reviewed. Based on this discussion, an encoder decoder framework is designed for an arbitrary number of quality layers, hereby also enabling region-of-interest coding. After that, the performance of the new system is exhaustively tested, showing that the bit rate increase typically encountered with scalable hybrid coding schemes is, for certain coding parameters, only small to moderate. The double- and triple-layer constellations of the framework are shown to perform superior to other systems.
The second part considers layered code streams as generated by the scheme of the first part. Various error propagation issues in hybrid streams are discussed, which leads to the definition of a decoder quality constraint and a segmentation of the code stream to transmit. A packetization scheme based on successive source rate consumption is drafted, followed by the formulation of the channel code rate optimization problem for an optimum assignment of available codes to the channel packets. Proper MSE-based error metrics are derived, incorporating the properties of the source signal, a terminate-on-error decoding strategy, error concealment, inter-packet dependencies, and the channel conditions. The Viterbi algorithm is presented as a low-complexity solution to the optimization problem, showing a great adaptivity of the joint source channel coding scheme to the channel conditions. An almost constant image qualiity is achieved, also in mismatch situations, while the overall channel code rate decreases only as little as necessary as the channel quality deteriorates. It is further shown that the variance of code distributions is only small, and that the codes are assigned irregularly to all channel packets.
A double-layer constellation of the framework clearly outperforms other schemes with a substantial margin.
Keywords — Digital lossy video compression, visual communication, variable bit rate (VBR), SNR scalability, layered image processing, quality layer, hybrid code stream, predictive coding, progressive bit stream, joint source channel coding, fidelity constraint, channel error robustness, resilience, concealment, packet-switched, mobile and wireless ATM, noisy transmission, packet loss, binary symmetric channel, streaming, broadcasting, satellite and radio links, H.264, MPEG-4 AVC, Viterbi, trellis, unequal error protection
3
Mai, Thi Xuan Huong <1988>. "Digital transformation – The movements of marketing and consumer behaviors towards digital platforms – Video streaming use case". Master's Degree Thesis, Università Ca' Foscari Venezia, 2022. http://hdl.handle.net/10579/21689.
Streszczenie:
This thesis aims to picture the movements of marketing and consumer behaviors in the era of digitalization, video streaming is an example of the transformation by taking imcreasingly a vital role in digital marketing strategy. Through this thesis, we can understand the transformation from traditional to digital platforms in marketing practice. This thesis also indicates the comparison between gen Z versus other Generations in term of online behavior during and post Covid-19 epidemic and therefore open the discussion about the threats and opportunities for brands to maintain and develop.
Based on theory of marketing in general and digital marketing in specific, this thesis also skims through some public research which is related to marketing definition & history, milestones of digital marketing as well as current situation of digital marketing. Another part of the theory that the Digital reports are based on consumer behavior indicated to online activities which puts a strong foundation to explain how consumers shift to use online for searching information as well as making decision to choose brands for their needs. The concepts, marketing channels are introduced to form fundamental knowledge. Sources of theoretical knowledge are from books, public research, thesis, mainly from internet, study program and library.
The main research part uses quantitative research and desk research to form up an integrated information to demonstrate and explain the practice. Quantitative survey helps to understand consumers’ behavior regarding online activities and desk research is to confirm the findings from quantitative survey on a boarder scale. More specific, the research is based on three pointed markets: Italy, Iran and Vietnam which will support to understand in specific markets as well as to give an idea to picture how the life of people under Covid-19 and how they change their behavior in shopping to online platforms.
Outcome insights will help to contribute consumer insight to recommend in understanding the circumstance of the market under the impacts of Covid-19 for all businesses. Furthermore, the reasons why customers tend to use which platform by which format will help the businesses to build up a marketing plan properly. The other objective is to figure out the triggers and the barriers of using any format of information will bring brands to the new era of providing what customers’ needs. Finally, the insights from the research also help marketers to admit that digital marketing is indispensable aspect to keep in touch with target customers as well as improving brand health by reach more and right customers. Another part of the survey will object to Live streaming which is taking an important role in term of connecting customers and selling products. Live Streaming which is a part of video streaming is a potential channel that businesses could focus on in the future.
4
Lindmäe, Maria. "Reimagining the city: hip hop and the social transformation of Comuna 13, Medellín". Doctoral thesis, Universitat Pompeu Fabra, 2020. http://hdl.handle.net/10803/668921.
Streszczenie:
This dissertation studies the role of music making in the social construction of the city within the paradigm of the experience economy. Music making as collective organization of sound that requires decisions of what is being emitted and what not, of what creates harmony and what produces dissonance, is also the organization of the imaginary and real spaces where it is created. Looking at hip hop as a social process that is constitutive of and constituted by in-between differential spaces, the thesis puts into value vernacular practices of creativity, analysing their role in the social reconstruction of Comuna 13 in Medellín, Colombia. Focusing on the cultural heritage of Comuna 13 that has been created by young artists as a means of resistance to (state) violence, the dissertation argues that urban social formations, such as hip hop groups, have an important role in empowering youth and in creating counter-dominant place narratives to the elitist city imagery.La presente tesis estudia el papel de la práctica musical en la construcción social de la ciudad desde el paradigma de la economía de la experiencia. La práctica musical, entendida como la organización colectiva sonido que requiere tomar decisiones sobre lo que se emite o lo que no, y sobre lo que crea armonía o lo que produce disonancia, también organiza el espacio imaginario y real donde esa música se crea. Destacando al hip hop como un proceso social que constituye y a su vez está constituido por espacios intermedios diferenciales, la tesis pone en valor las prácticas de creatividad vernácula, analizando su función en la reconstrucción social de la Comuna 13 de Medellín, Colombia. La investigación, centrada en el patrimonio cultural creado por jóvenes artistas como un medio de resistencia a la violencia (estatal), sostiene que las formaciones urbano-sociales, como los grupos de hip-hop, tienen una repercusión importante en el empoderamiento de la juventud y en la creación de narrativas de lugar alternativas al imaginario elitista de la ciudad.
5
Čermák, Marek. "Detekce optického disku v sériích snímků z video oftalmoskopu". Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-316826.
Streszczenie:
This work is focused on automatic detection of optic disc in retinal images. There is briefly described anatomy of human eye, principles of retinal imaging and also overview of the methods used for optic disc detection. The practical part describes developed procedures for optic disc detection, ie detection based on watershed transform, active contours and also on region growing technique. The main method of this work is the method of circular transformation, which as the only one allowed to detect the optic disc on the images of video ophtalmoscope and also on the high quality images from fundus cameras. This method was tested on three datasets. The average overlap 92,44 % was achieved for HRF dataset, 91,03 for DRIONS dataset and 77,36 for images of video ophtalmoscope.
6
Grimm, Martial. "Proposition d'une nouvelle méthode de transformation de signaux video rvb/hsi : application aux systèmes de vision couleur temps réel". Nancy 1, 1994. http://docnum.univ-lorraine.fr/public/SCD_T_1994_0322_GRIMM.pdf.
Streszczenie:
L'espace colorimétrique HSI, offre une multitude d'avantages en analyse et traitement d'images couleurs (attributs h et s) insensibles aux variations d'éclairement de la scène, représentation des couleurs analogue à celle de l'il, segmentation chromatique robuste et bien adaptée aux images réelles. Cependant les cameras et autres capteurs d'images délivrent des signaux standards RVB et la transformation RVB HSI à la cadence vidéo est encore mal maitrisée (transfert d'espace incomplet, pertes de signification des attributs h et s en certaines zones, aberrations dues à la discrétisation des signaux amont). Pour tenter de résoudre certains de ces problèmes, nous avons choisi une méthode de transformation non conventionnelle qui aboutit à l'élaboration d'une architecture analogique-numérique. Toutes les fonctions hormis les relations trigonométriques sont réalisées en analogique. La numérisation n'apparait qu'en fin de traitement. Les améliorations obtenues par rapport aux méthodes entièrement numériques sont d'une part, une augmentation de la zone chromatique de l'espace HSI ; d'autre part, la transition chromatique/achromatique présente une meilleure continuité ce qui permet des différenciations de couleur acceptables même à faible niveau. Enfin, un format de 3x8 bits offre un nombre de couleur discernable analogue à celui du cube RVB.
7
Kabusheva, Sabina. "Transformation of Telco business strategy driven by over-the-top services such as WhatsApp, Skype and Netflix: The case of the Czech Republic". Master's thesis, Vysoká škola ekonomická v Praze, 2015. http://www.nusl.cz/ntk/nusl-206054.
Streszczenie:
The following thesis aims to describe the transformation of telco operators' business strategy evoked by the growing popularity and usage of Internet services like WhatsApp, Skype and Netflix, also known as over-the-top services. The thesis provides comprehensive overview of transformations in the telecom industry that have been taking place globally, explaining the drivers that led to inception of free or cheaper Internet-based services, their business models. It then narrows down to the thorough analysis of the Czech market, capturing the implications that over-the-top services have on business strategy of the major Czech telco players. The analysis is strongly supported by industry reports, statistics and quantitative research. The primary research adds in telco customers' perspectives, usage and value perception of over-the-top services, as well as their satisfaction with respective telco services and their pricing. Derived findings identify major developments and trends in the Czech telco market; they also suggest compelling observations for related businesses.
8
Mehta, Smith. "The 'new screen ecology' in India: A study in digital transformation of media". Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/208077/1/Smith_Mehta_Thesis.pdf.
Streszczenie:
The thesis provides an in-depth study on the emergence of the Indian online audio-visual landscape by showing how the launch of a local and global suite of social media platforms like Youtube, Facebook, and portals like Hotstar, TVFPlay, Netflix shape the working conditions of above-the-line labor. Drawing on in-depth interviews with three categories of professionals: creators, platform and portal executives, and intermediaries (talent agents, multi-channel networks), this research demonstrates how the Indian screen industries are affected by social relations between these professionals and how their industrial practices blur the content and creator-based distinctions between platforms and portals.
9
PALLONE, Grégory. "DILATATION ET TRANSPOSITION SOUS CONTRAINTES PERCEPTIVES DES SIGNAUX AUDIO : APPLICATION AU TRANSFERT CINEMA-VIDEO". Phd thesis, Université de la Méditerranée - Aix-Marseille II, 2003. http://tel.archives-ouvertes.fr/tel-00003363.
Streszczenie:
La coexistence de deux formats : cinéma à 24 images/s et vidéo à25 images/s, implique l'accélération ou le ralentissement de la
bande-son lors du transfert d'un format vers l'autre. Ceci
provoque une modification temporelle du signal sonore, et par
conséquent une modification spectrale avec altération du timbre.
Les studios de post-production audiovisuelle souhaitent compenser
cet effet par l'application d'une transformation sonore adéquate.
L'objectif de ce travail est de fournir à l'industrie
audiovisuelle un système permettant de pallier la modification de
timbre engendrée par le changement de vitesse de lecture. Ce
système se compose d'une part d'un algorithme de traitement et
d'autre part d'une machine sur lequel il est implanté.
L'algorithme est conçu et développé pour répondre aux contraintes
liées à la qualité sonore et à la compatibilité multicanal. La
machine, baptisée HARMO, est conçue spécifiquement par la société
GENESIS sur la base de processeurs de signaux numériques, et doit
répondre à la contrainte de temps-réel. Cet aspect "valorisation"
conduit à intégrer dans le projet les contraintes de coût et de
délai de réalisation.
Un état de l'art basé sur une bibliographie quasi-exhaustive
aboutit à une classification originale des méthodes de dilatation
et de transposition existantes. Ceci nous amène à distinguer et à
étudier les méthodes classiques temporelles et fréquentielles, et
à introduire les méthodes temps-fréquence. Cette classification
est à la base de plusieurs méthodes innovantes :
1. deux méthodes temps-fréquence dont l'analyse est adaptée à l'audition,
2. deux méthodes couplées qui associent les avantages des méthodes temporelles et fréquentielles,
3. une méthode temporelle basée sur une amélioration des méthodes existantes.
Les algorithmes sont évalués grâce à une banque de sons-test
spécifiquement élaborée pour mettre en évidence les défauts
caractéristiques des algorithmes. Notre choix final s'est porté
sur l'approche temporelle, que nous optimisons par l'adjonction de
critères de segmentation basés sur l'autocorrélation normalisée et
la détection de transitoires. Cet algorithme s'intègre dans un
logiciel qui a été structuré pour un fonctionnement temps-réel et
multicanal sur le système HARMO.
10
Hyatt, Jonathan Charles. "The Criterion of Quality: A Paratextual Analysis of the Criterion Collection in the Age of Digital Distribution". Chapman University Digital Commons, 2014. https://digitalcommons.chapman.edu/film_studies_theses/1.
Streszczenie:
In 2011, home-video distribution company, The Criterion Collection, teamed up with streaming-content provider Hulu, extending their business model to include online streaming to subscribers through Hulu Plus. With the rise of Over-The-Top (OTT) media distribution services into the at-home market, the question that Criterion now faces is: how will the company survive as the market shifts away from Criterion’s established values? And, more pertinently, how does Criterion, by rebranding their image to compete in the streaming market, hope to attract new users without alienating their established fan base or sacrificing their brand identity? This thesis examines the Criterion Collection’s brand identity, business model, and history, focusing on its packaging and promotion, distribution channels (physical and streaming), and the formation of a self-established cinephile community through their website, Criterion.com. In my examination of Criterion’s attempts to branch out into new markets and adapt to alternative modes of media consumption, I argue that Criterion is taking strides to attract new audiences and build a tightly knit online fan community around their brand.
11
Vadkerti, Kristián. "Optické metody měření kontrakce izolované srdeční buňky". Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218725.
Streszczenie:
Diploma work is focused on basic characteristics of optical measuring methods commonly used to rate contactions of isolated heart cell and describes basic actions, that are connected with it. A camera record made by a microscope served as basis for optical measuring methods of contractions chosen by us, with using appropriate method elaborating and analysis of pictures used for detection of important part of cell structure. The suggested user application built-up in Matlab environment allows analysis and interpretation of contractional functions in two methodical ways.
12
Banda, Dalitso Hansini. "Deep video-to-video transformations for accessibility applications". Thesis, Massachusetts Institute of Technology, 2018. https://hdl.handle.net/1721.1/121622.
Streszczenie:
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2018
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 73-79).
We develop a class of visual assistive technologies that can learn visual transforms to improve accessibility as an alternative to traditional methods that mostly rely on extracted symbolic information. In this thesis, we mainly focus on how we can apply this class of systems to address photosensitivity. People with photosensitivity may have seizures, migraines or other adverse reactions to certain visual stimuli such as flashing images and alternating patterns. We develop deep learning models that learn to identify and transform video sequences containing such stimuli whilst preserving video quality and content. Using descriptions of the adverse visual stimuli, we train models to learn transforms to remove such stimuli. We show that these deep learning models are able to generalize to real-world examples of images with these problematic stimuli. From our experimental trials, human subjects rated video sequences transformed by our models as having significantly less problematic stimuli than their input. We extend these ideas; we show how these deep transformation networks can be applied in other visual assistive domains through demonstration of an application addressing the problem of emotion recognition in those with the Autism Spectrum Disorder.
by Dalitso Hansini Banda.
M. Eng.
M.Eng. Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science
13
Fleck, Rika. "Erklärvideos zur Wissensvermittlung im Hochschulkontext: ein Praxisbeispiel im fächerübergreifenden Austausch". TUDpress, 2019. https://tud.qucosa.de/id/qucosa%3A36569.
Streszczenie:
Fakt ist, ein Erklärfilm ist nicht die alleinige Lösung für die aktive Lehre und auch nicht für Blended-Learning-Szenarien. Es bedarf immer einen Wechsel unterschiedlicher Methoden und unterschiedlicher Medien, die sich im Lernprozess abwechseln, um die verschiedenen Lerntypen anzusprechen. Fakt ist aber auch, der Erklärfilm spielt beim Lernen eine Schlüsselrolle. [... aus der Einleitung]
14
Su, Jonathan K. "Adaptive rate-constrained transform video coding". Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/13364.
15
Dugnolle, Patrick. "Outils mathématiques appliqués à l'analyse stoechiométrique d'une séquence vidéo-microscopique de cicatrisation in vitro en contraste de phase". Université Joseph Fourier (Grenoble), 2000. http://www.theses.fr/2000GRE10031.
Streszczenie:
Cette these porte sur le developpement d'outils permettant la confrontation entre certaines representations mathematiques de la migration et de la proliferation cellulaire et les donnees experimentales extraites d'un processus de cicatrisation in-vitro. Le premier chapitre introduit la notion d'independance cellulaire par un processus de markov et decrit un modele theorique du deplacement aleatoire et du dedoublement periodique. Par une analyse mathematique de la propagation d'un front migratoire rectiligne, l'objectif est de definir un estimateur des donnees representatives des cellules prenant part a l'activite colonisatrice en appliquant la notion de stchiometrie a l'equation de conservation d'un flux cellulaire, le deuxieme chapitre presente un enregistrement videomicroscopique, et definit les outils de traitements d'images necessaires aux calculs de la densite et du flux cellulaire. La mise en evidence d'un bruit thermique d'acquisition video implique l'utilisation d'une methode de debruitage : la transformation en ondelettes engendrees par dilatation d'une b-spline constitue un outil efficace. La detection des cellules par les valeurs localement maximales du signal est une methode simple et robuste. L'echantillonnage temporel permet de se placer sous l'hypothese de detection des mouvements minimaux. La combinaison de ces approches evite les problemes difficiles de segmentation du signal lumineux. Le troisieme chapitre est consacre a la mise en uvre de la methode et a la presentation des resultats obtenus, jusqu'a l'estimation du temps de doublement de la population cellulaire etudiee. Le quatrieme chapitre decrit les conditions de validation et presente une estimation des incertitudes. Ce travail theorique se situe a l'interface entre representations mathematiques et etudes experimentales des mecanismes biologiques. Il a pour objectif de fonder un ensemble d'outils efficaces permettant une quantification systematique du processus de cicatrisation in-vitro.
16
Dusong, Emma. "Chanter les transformations : voix, performance, vidéo, film". Amiens, 2011. http://www.theses.fr/2011AMIE0020.
Streszczenie:
Chanter favorise un dialogue avec le monde. Il faut prendre souffle pour produire un son vocal, ce qui lie cette action au "vivre". L'utilisation du verbe (plutôt que du substantif) indique une action qui si déploie ici au coeur de l'art contemporain et interroge les déplacements vers les arts plastiques d'une pratique issue a priori du champ musical. L'espace d'exposition engage de nouvelles modalités de réception. Les voix s'élèvent pour accompagner les transitions, les difficultés. De la naissance à la mort, de l'enfance à l'âge adulte, on chante dans les vidéos, les pièces sonores, les films. . . . Les chants tiennent compagnie dans les périodes de vulnérabilité. Au coeur de la voix, les artistes jouent et déjouent les attentes et entreprennent des transformations. Cette thèse issue d'une pratique personnelle donne le rôle principal aux oeuvres décrites et étudiées sous l'angle du "chanter"To sing is to favour a dialogue with the world. One must take a breath to produce a vocal sound- this connects the action of singing to the action of living. Emphasizing the verb to live/ to sing (rather than the noun life/ song) underscores an action that pulsates at the heart of contemporary art and examines the adoption of a practice usually restricted to the musical field. The exhibition space commits new modes of reception: voices rise to accompany transitions and difficulties. From birth to death, from childhood to adulthood, one sings in videos, sound pieces, films. . . . Singing keeps one company during periods of vulnerability. At the core of the voice, artists play and thwart expectations and undertake transformations. This thesis is based on personal practice, giving the leading role to the works describred and studied from the perspective of singing
17
Tall, Gay. "Conception et réalisation d'une architecture spécialisée pour la transformation de Fourier bidimensionnelle en temps réel vidéo". Rouen, 1993. http://www.theses.fr/1993ROUES060.
Streszczenie:
Les méthodes de traitement d'images qui utilisent la transformation de Fourier bidimensionnelle sont nombreuses et variées. Cependant, l'énorme quantité de données mises en jeu par ces méthodes entraîne des temps de traitement assez élevés. C'est la raison pour laquelle elles sont très peu utilisées en pratique. Avec le développement des techniques numériques performantes et les progrès technologiques effectués dans ce domaine, la réalisation de ces méthodes devient possible. Dans le but d'étendre cette évolution vers les applications temps réel, nous proposons dans cette thèse une architecture spécialisée pour la transformation de Fourier bidimensionnelle en temps réel vidéo. L'objectif est d'effectuer en temps réel des transformations d'images de 512512 points, au rythme de 25 images par seconde. Les deux points critiques de cette architecture ont été la vitesse de traitement, la dynamique du système de codage des données. Le choix du processeur de traitement a été effectué suivant ces deux critères. L'architecture proposée, qui s'intègre dans l'environnement Imaging, est construite à base de processeurs de Fourier. Elle a été conçue avec le logiciel de CAO, Workview. Les fonctionnalités observées par simulation sont conformes au système spécifié. L'implantation donne deux cartes au format VME
18
Papadopoulos, Constantinos A. "The use of geometric transformations for motion compensation in video data compression". Thesis, King's College London (University of London), 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.264923.
19
Macy, Michelle. "Technology Use as Transformative Pedagogy: Using Video Editing Technology to Learn About Teaching". Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/3227.
Streszczenie:
Within the paradigm of Sociocultural Theory, and using Activity Theory as a data-gathering and management tool, this microgenetic case study examined the
processes - the growth, change, and development - engaged in by student-teachers in a foreign language education program as they worked together to complete an activity.
The activity involved digital video recording and editing, mediators which were intended
to facilitate the iterative review of and subsequent reflection and action upon the content of the video during its creation.
By investigating the process of contextual interaction between learners and the
mediational elements of their environment as the activity progressed, this study intended to further understanding of preservice teacher development in at least two important ways. The aims of this study were to discover a) tangible evidence of cognitive transformation (development in the form of regulation), as well as b) aspects of professionalization into a community of skilled second language teachers (as evidenced by activity).
The present study took place in a graduate-level foreign language/TESOL
education practicum course. The activity involved the making of a digital video to
explain and exemplify a given second language instructional approach, as well as the
rationale behind and methods of targeting a specific language skill. Using theoretical
constructs previously shown to be effective in the pedagogy of teacher preparation, the
creators of this task endeavored to design a socially- and artifact-mediated activity with the potential to broaden and deepen student-teachers' pedagogical and professional
knowledge.
The student-teachers failed to engage in meaningful dialogical or critical reflection as they engaged in the task, and made no perceptible regulative movement.
What ultimately was revealed in the case of the study participants was a disconnect
between the intentions of the core-task designers and the outcomes effected by the
student-teachers. The data gleaned from this close examination of student-teacher
processes was revelatory in terms of the quantity and types of factors that appeared to
significantly impact the outcomes of the project. These factors have the potential to
inform the process of translating socio-cultural theory into pedagogical practice, and should be of interest to anyone involved in the development of student-teachers, including those who design or deliver preservice teacher curricula.
Discussed are the possible explanations for the disconnect between the designers
and administrators of the activity and the participants in the study. Also considered are
the potentially serious implications for second language teacher education programs and their curricula in terms of the application of sociocultural constructs to learning tasks and environments.
Recommendations include increased scaffolding by the course professor through
direct guidance, as well as by structuring tasks to facilitate students' ability to collaborate and to perceive and resolve the conflicts, contradictions, and tensions that arise during the course of the activity. On a broader level, serious examinations of teacher education programs and curricula are also recommended to look for ways to better understand, align, and achieve the goals of teacher developers and those of their student-teachers.
20
Breimyer, Paul. "The Fast Fourier Transform in the MPEG encoding algorithm". Diss., Connect to the thesis, 2001. http://hdl.handle.net/10066/1488.
21
Iracane, Daniel. "Etude des condensats de gluons au moyen d'une transformation de bogoliubov". Paris 11, 1985. http://www.theses.fr/1985PA112162.
Streszczenie:
Une étude du secteur non perturbatif de QCD est proposée. Son but est la description de l'état fondamental de QCD comme un condensat de gluons. Dans le cadre du formalisme hamiltonien en jauge de Coulomb, nous introduisons une interaction effective sur les gluons de grande longueur d'onde par élimination du reste de l'espace de Fock. Nous utilisons un principe variationnel sur un sous-espace de Fock obtenu par une transformation de Bogoliubov appliquée aux bosons. La minimisation conduit aux équations de Bogoliubov dont la résolution détermine à la fois le fondamental et ses excitations. Différentes formes d'interactions sont étudiées. Nous montrons ainsi que l'espace fonctionnel minimal pour une dynamique de bosons est constitué par l'ensemble des distributions. D'autre part plusieurs types de condensations sont réalisables. Nous donnons les contraintes sur l'interaction pour que la solution de Bose usuelle soit rejetée au profit d'une condensation du type supraconducteur. Alors que la condensation de Bose ne concerne que les états d'impulsion nulle, la solution supraconductrice présente un gap strictement positif dans le spectre de quasigluons qui est ainsi entièrement polarisé. La transformation de Bogoliubov apparaît donc comme un outil privilégié pour l'étude des problèmes infrarouges d'une dynamique de bosons non massifsWe describe the ground state of non-perturbative QCD as a gluon condensate. In the framework of the Coulomb gauge hamiltonian, we introduce an effective interaction between infrared gluons by removing high-momentum gluons. The Bogoliubov transformation provides us with our variational space. The minimisation over this Fock subspace leads to a non-perturbative vacuum and its excitations. The minimum functional space for a boson dynamic is a distribution set. We find two kinds of condensation. The first one occurs only for zero-momentum states and looks like the Bose Condensation. In the second one, the quasiparticle spectrum shows a finite gap and the vacuum is a supraconducting state. We give constraints on the interaction so that the supraconducting phase is more bounded than the Bose one
22
Pospíšil, Petr. "Knihovna pro efektivní záznam videa v 3D aplikaci". Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2012. http://www.nusl.cz/ntk/nusl-236587.
Streszczenie:
This thesis deals with library for recording video in the background of 3D application. A library is designed to work under the Microsoft Windows and Linux operation systems. It records image and also sound. Image recording is supported in OpenGL, Direct3D9, Direct3D10 and Direct3D11. To reduce video data size, library supports image compression using MJPG codec. Audio is recorded by WaveForm audio, Windows Core Audio or ALSA. Recorded sound is for whole operation system. A library is able to record up to two audio streams to accommodate possible microphone input. It can mix audio data together if needed. Output data are then written into AVI file. It is possible to write own text information as overlay that is rendered as part of application screen output.
23
Brandner, Vera Rosamaria [Verfasser], i Ulli [Akademischer Betreuer] Vilsmaier. "Die Bilder der Anderen erforschen. Generative Bildarbeit: Das transformative Potential fotografischer Praxis in Situationen kultureller Differenz / Vera Rosamaria Brandner ; Betreuer: Ulli Vilsmaier". Lüneburg : Universitätsbibliothek der Leuphana Universität Lüneburg, 2018. http://d-nb.info/1160442053/34.
24
Moubtahij, Redouane El. "Transformations polynomiales, applications à l'estimation de mouvements et la classification". Thesis, Poitiers, 2016. http://www.theses.fr/2016POIT2268/document.
Streszczenie:
Ces travaux de recherche concernent la modélisation de l'information dynamique fonctionnelle fournie par les champs de déplacements apparents à l'aide de base de polynômes orthogonaux. Leur objectif est de modéliser le mouvement et la texture extraites afin de l'exploiter dans les domaines de l'analyse et de la reconnaissance automatique d'images et de vidéos. Nous nous intéressons aussi bien aux mouvements humains qu'aux textures dynamiques. Les bases de polynômes orthogonales ont été étudiées. Cette approche est particulièrement intéressante car elle offre une décomposition en multi-résolution et aussi en multi-échelle. La première contribution de cette thèse est la définition d'une méthode spatiale de décomposition d'image : l'image est projetée et reconstruite partiellement avec un choix approprié du degré d'anisotropie associé à l'équation de décomposition basée sur des transformations polynomiales. Cette approche spatiale est étendue en trois dimensions afin d'extraire la texture dynamique dans des vidéos. Notre deuxième contribution consiste à utiliser les séquences d'images qui représentent les parties géométriques comme images initiales pour extraire les flots optiques couleurs. Deux descripteurs d'action, spatial et spatio-temporel, fondés sur la combinaison des informations du mouvement/texture sont alors extraits. Il est ainsi possible de définir un système permettant de reconnaître une action complexe (composée d'une suite de champs de déplacement et de textures polynomiales) dans une vidéoThe research relies on modeling the dynamic functional information from the fields of apparent movement using basic orthogonal polynomials. The goal is to model the movement and texture extracted for automatic analysis and recognition of images and videos. We are interested both in human movements as dynamic textures. Orthogonal polynomials bases were studied. This approach is particularly interesting because it offers a multi-resolution and a multi-scale decomposition. The first contribution of this thesis is the definition of method of image spatial decomposition: the image is projected and partially rebuilt with an appropriate choice of the degree of anisotropy associated with the decomposition equation based on polynomial transformations. This spatial approach is extended into three dimensions to retrieve the dynamic texture in videos. Our second contribution is to use image sequences that represent the geometric parts as initial images to extract color optical flow. Two descriptors of action, spatial and space-time, based on the combination of information of motion / texture are extracted. It is thus possible to define a system to recognize a complex action (composed of a series of fields of motion and polynomial texture) in a video
25
Puri, Saurabh. "Learning, selection and coding of new block transforms in and for the optimization loop of video coders". Thesis, Nantes, 2017. http://www.theses.fr/2017NANT4075/document.
Streszczenie:
Les transformées sont un élément clé dans les systèmes de codage vidéo par blocs. Cette thèse approfondit les schémas d’apprentissage à multiples transformées. Une première contribution de ce travail est consacrée à l’évaluation de schémas d’apprentissage de transformées de deux types en ligne et hors ligne. Les deux approches sont comparées en détail et leur pertinence respective révélées. Nous proposons ensuite plusieurs techniques afin d’améliorer la stabilité du système d’apprentissage et réduire le coût de la signalisation. Une seconde contribution concerne les schémas d’apprentissage multi-transformées hors ligne déjà connus qui sont étendus avec pour objectifs de 1) fournir des transformées plus génériques et moins biaisées, 2) obtenir des gains de compression plus élevés, 3) réduire la complexité d’encodage et de décodage. On propose un schéma dit IMDTC (Improved Mode Dependent Transform Competition) qui offre un gain de codage très significatif, plus de 5% par rapport à HEVC standard sous la configuration All Intra (AI), avec une augmentation de complexité raisonnable. Enfin, l’adaptabilité au contenu de l’apprentissage hors ligne est étendue en explorant une nouvelle approche d’apprentissage des transformées basée sur des jeux de transformées adaptées à des contenus. Plusieurs ensembles contenant de multiples transformées sont appris sur différents contenus et regroupés en jeu. Lors du codage d’une région donnée d’une image, un ensemble de transformées est sélectionné localement à partir du jeu. Les résultats numériques montrent le potentiel élevé de cette approche par rapport aux approches classiques en ligne et hors ligneTransforms are a key element in block-based video coding systems which, in conjugation with quantization, is important for the overall compression efficiency of the system. This thesis explores multipletransform- based learning schemes. A first contribution of this work is dedicated to the evaluation of transform learning schemes with two flavors 1) online learning, and 2) offline learning. The two approaches are compared against each other and their respective appropriability is studied in detail. Some novel techniques are proposed in this work to 1) improve the stability of the learning scheme and 2) to reduce the signaling cost. In a second contribution of this thesis, the offline multiple-transform learning schemes already known in the literature are further extended with the aims to altogether 1) provide more generic transforms that are less biased towards specific classes of contents, 2) achieve higher compression gains, 3) reduce encoding and decoding computational complexity. An improved Mode Dependent Transform Competition (IMDTC) scheme is proposed which provides a considerable gain of over 5% compared to standard HEVC under All Intra (AI) configuration at a complexity just 2.9 times the standard HEVC. Finally, the content adaptability aspect of the offline learning is explored through a novel content-adapted pool-based transform learning approach where several multiple-transform sets are learned on different contents and pooled together. During the coding of a given region of an image, one transform set is selected locally from the pool. Numerical results show the high potential of this approach against the conservative online and offline approaches
26
Timoumi, Souad. "Transformation physiques et chimiques de l’azithromycine au cours du séchage par contact en lit agité et sous vide". Lyon 1, 2008. http://www.theses.fr/2008LYO10147.
Streszczenie:
Les deux objectifs principaux de ce travail étaient : 1) l’étude expérimentale de la transformation physique de l’azithromycine induite par la variation des conditions hygrothermiques et ses conséquences éventuelles sur les propriétés du produit séché ; 2) la détermination à l’aide d’un plan d’expériences, des conditions opératoires de séchage qui permettent d’obtenir le meilleur compromis entre la pureté chimique du produit et la durée de séchage. Par rapport au premier objectif, la masse volumique, la capacité thermique massique, la conductivité thermique la solubilité et les isothermes de désorption ont été d’abord mesurées sur le produit commercial. Ensuite, les analyses microscopiques (PLM), gravimétrique TGA), calorimétrique (DSC) et cristallographique (XRPD) ont été effectuées sur le produit commercial et le produit étuvé à 50°C et 80°C. D’après ces analyses, l’azithromycine chauffée de la température ambiante jusqu’à 80°C subit une déshydratation isomorphique (sans modification de la structure cristalline) et passe de la forme dihydratée stable à la forme anhydre très hygroscopique. Par apport au deuxième objectif, des essais ont été réalisés à l’aide d’un séchoir de laboratoire selon un plan d’expériences de deuxième ordre. Les paramètres opératoires étaient la pression totale dans la cuve, la température de la paroi chaude et la vitesse de rotation de l’agitateur. Les réponses du plan correspondaient à la teneur totale en impuretés et aux teneurs en impureté A et en impureté B. Il s’est avéré que la diminution de la pression et surtout l’augmentation de la température conduisaient, d’une part à, une augmentation notable de la teneur en impuretés dans le produit final mais, d’autre part, à une diminution importante de la durée de séchage. L’apparition de l’impureté A était de manière évidente activée par la température. Finalement, un optimum opératoire global a été établi en ciblant les valeurs maximales tolérées des teneurs en impuretés et en minimisant le temps de séchageThe two main objectives of this word were : 1) the experimental study of the effect of hygro-thermal conditions variation on the physical stability and the thermophysical properties of azithromycin ; 2) the determination of the drying operating conditions that provide the best compromise between the chemical purity of the product and the processing time by means of an experimental design. As concerns the first goal, the density, the heat capacity, the heat conductivity, the solubility and the desorption isotherms of the commercial azithromycin, were determined for a start. Then, the samples heated at 50°C and 80°C were analysed by PLM, DSC, TGA and WRPD techniques and the data were compared to that of the original sample. According to these data, the original azithromycin was a stable dehydrate which converted by isomorphic dehydration (the crystalline lattice remained unchanged) to a very hygroscopic anhydrate when heated up to 80° C. As concerns the second goal, drying trials were realised by means of laboratory equipment according to a second order experimental design. The operating parameters were the heating wall temperature, the vessel total pressure and the rotational speed of the stirrer. The responses of our experimental plan were the total impurity content and the specific contents of impurities A and B. According to our results, the highest temperatures and lowest pressures corresponded, on one hand, to the lowest drying times, but, on the other hand, to the highest impurities contents. The generation of impurity A was evidently activated by temperature. Finally, a global operating optimum was determined by targeting the maximum tolerated impurities contents and by minimizing the drying time
27
Booth, Sarah. "Les états de transformation dans une installation à partir de la matrice-tableau". Master's thesis, Université Laval, 2016. http://hdl.handle.net/20.500.11794/26867.
Streszczenie:
Ce mémoire propose de retracer un parcours sur l'expérience du processus, mes essais en productions et en diffusion. Développé en trois parties, il décrit d'abord mes premières impressions perceptuelles des oeuvres, ensuite les différentes étapes qui auront ponctué ma recherche-création. Attentive à ce qui se passe en dehors des ateliers et des centres de diffusion en arts visuels, mes écrits sont teintés de mes expériences de diffusion et de création dans les lieux urbains et même, dans le dernier mois, dans le paysage naturel. J'explore mes méthodes de recherche-création instinctive et les différentes facettes entre les thèmes de la tension et de l'abandon. Je m'intéresse à la perception de ces mondes, à leurs cohabitations, à ce qu'ils produisent dans l'oeuvre finale et même, à l'expérience de mon propre corps. Je traiterai également du médium vidéo et de la valeur de l'image en comparaison aux autres médiums exploités, un ensemble d'oeuvres qui matérialisent une certaine temporalité de l'image en mouvement, où l'expérience à vivre est celle de l'instant suspendu ou une vision renouvelée du temps qui passe.
28
Bertling, Wiik Siri. "Whispering Bodies : The Textual Brain". Thesis, Stockholms konstnärliga högskola, Institutionen för scenkonst, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uniarts:diva-939.
Streszczenie:
During this project I’ve been exploring how we can work with things within art to change our way of relating to ourselves, other humans and our surrounding. I want to see if finding inner spaces within us can make us feel more connected to our external surrounding. I want to share the feeling of being connected with things through incorporating them inside our own bodies. I have therefore been leading participants on introspective journeys where they found rooms inside of their bodies. After that I have been translating these inner spaces into immersive performative Scenography, where visitors have been invited to engage with the things in the space with all their senses. All the bodies, things as well as visitors, have been given the possibility to interact on their own terms. I wanted to see what kind of relating this room of Whispering Bodies; the Immersive Scenography inspired and invited to, and I wished for it to be a tactile bonding with a sense of heightened empathy and listening. This text-based piece, called Whispering Bodies: The Textual Brain, is created out of a curiosity in how a reflection based in the written language can exist as a complementary work for a physical and tactile space, in this case Whispering Bodies: The Immersive Scenography. I wanted to create an experience that would have traces of the room filled with different bodies. I have been experimenting with how to use different mediums to make this happen, and this piece will be a combination of meditation, video, drawings, audio and text, and the text itself will be jumping in between genres. I want to invite you to take part in this journey with me. It will be dry, it will be poetic, it will be telling you what happened, both the factual and the fictional. If you have any questions, feel free to contact me about the work.
29
Benzerzour, Mohamed. "Transformations urbaines et variations du microclimat : application au centre ancien de Nantes et proposition d'un indicateur "morpho-climatique"". Phd thesis, Université de Nantes, 2004. http://tel.archives-ouvertes.fr/tel-00428536.
Streszczenie:
Cette recherche porte sur l'analyse diachronique des interactions entre les paramètres physiques du microclimat et les transformations urbaines. La démarche mise en œuvre prend appui sur deux investigations complémentaires : une approche historique visant à mettre au jour les savoir-faire et les interventions qui ont visé, depuis les premiers temps de l'urbanisme salubriste, l'amélioration de l'environnement urbain; et une exploration à caractère physique sur la quantification des effets microclimatiques des transformations urbaines. L'une et l'autre portent de manière privilégiée sur le centre ancien de Nantes. Des reconstitutions ont ainsi été effectuées sur la base des sources historiques disponibles et cinq états représentatifs ont été définis allant de la fin du XVIIe siècle à la moitié de XXe. Des simulations numériques ont ensuite été réalisées à l'aide du modèle climatologique TEB, développé par le CNRM de Toulouse. Le principal résultat de cette évaluation physique a été de constater une augmentation considérable des flux de chaleur, une croissance progressive de la température de l'air et des surfaces, une augmentation de la vitesse du vent, ainsi qu'une déshumidification importante des espaces de ce centre. Cette efficience des transformations urbaines sur le microclimat nous a permis d'établir des corrélations entre les principaux paramètres d'intervention sur la ville (ouverture des vides urbains et minéralisation) et les phénomènes micro climatiques urbains. Ces corrélations ont été ensuite exploitées pour construire un indicateur morphologique permettant la caractérisation du microclimat urbain dans un projet de transformation urbaine. La définition de cet indicateur s'appuie sur deux objectifs : le premier vise à dépasser une limite du modèle TEB constatée lors des modélisations, le deuxième concerne la prise en compte de la corrélation entre les transformations urbaines et le microclimat. L'utilisation du modèle climatologique TEB, qui repose sur le concept de « rue canyon » pour modéliser la troisième dimension des zones bâties, a nécessité en effet d'opérer une réduction importante de la complexité de la forme urbaine. Pour dépasser cette limite, qui n'est pas propre à ce seul modèle, l'indicateur proposé reprend la notion de gabarit liée au canyon, mais l'étend par une analyse multidirectionnelle à l'évaluation de l'ouverture du vide urbain. Cet indicateur appelé « ouverture directionnelle » est applicable à plusieurs échelles spatiales et permet une caractérisation synthétique de l'espace (rue, place, cours, quartier, ensemble bâti) et du microclimat urbain. Une comparaison avec quelques résultats de simulations effectuées avec des outils du CERMA a permis de constater une bonne caractérisation de l'ensoleillement et de la vue du ciel et d'observer des résultats intéressants quant à la caractérisation du vent. En conséquence, « l'ouverture directionnelle », qui devra être complétée par la définition des états de surface, s'avère un indicateur prometteur pour rendre compte des interactions entre les paramètres physiques et morphologiques qui spécifient les environnements urbains.
30
Rimbaud, Christian. "Contribution aux mesures physiques utilisant une source modulée de rayonnement appliquée aux installations nucléaires". Grenoble 1, 1987. http://www.theses.fr/1987GRE10005.
Streszczenie:
Le but de ces mesures est de determiner certaines caracteristiques d'un milieu physique par utilisation d'une source de rayonnement (neutron ou gamma) et des techniques appropriees de traitement du signal (moyennage, transformee de fourier). Grace a un systeme de modulation de la source, la transformee de fourier permet d'extraire le signal du bruit de fond (provenant soit du systeme de mesure, soit du milieu physique). Les applications etudiees sont la mesure du taux de vide dans la branche chaude d'un rep par transmission gamma modulee et la mesure de quantite de matieres fissiles dans les usines de retraitement par utilisation d'une source de neutrons
31
Gao, FengFeng. "Quand le cinéma entre dans Montagnes-Eaux (Shan Shui) : Recherche sur la mise en oeuvre de la pensée chinoise de la nature dans le cinéma de Hou Hsiao-hsien". Sorbonne Paris Cité, 2015. http://www.theses.fr/2015USPCC295.
Streszczenie:
Cette recherche sur le rapport entre le récit du cinéma de Hou Hsiao-hsien et la pensée traditionnelle chinoise a pour ambition de viser à apporter un autre point de vue sur la construction du récit filmique propre à Hou Hsiao-hsien dont la culture se situe en dehors des codes occidentaux, à l'origine du cinéma. Utilisant le moyen cinématographique, Hou Hsiao-hsien a conservé une per¬ception propre à la culture chinoise qui pense le monde non pas en matière d'être, mais de souffle-énergie. Il crée, comme le ferait un peintre traditionnel chinois, en insufflant dans ses oeuvres une sensibilité qui lui est propre, en raison de son vécu, de ses origines. Pour une lecture du cinéma de Hou Hsiao-hsien, il faut inévita¬blement retourner à la source qui construit l'esprit artistique tradi¬tionnel chinois — la nature — à l'instar du Tao qui engendre toutes choses, mais ne se les adjuge pas, qui les accomplit, mais ne se fie pas à elle. La nature implique une situation sans forcer, qui ne dépend de rien, qui n'intervient pas, qui est conforme à toutes les choses en laissant venir ce qui vient de soi-même. Le cinéma de Hou Hsiao-hsien hérite de la nature représentée dans la peinture, et la transpose dans le domaine cinématographique avec la représen¬tation dans le contenu, la structure et le style, et à travers la relation entre champs et hors-champ de l'image, le mouvement de caméra, la construction de l'espace filmique, la coordination du son et de l'image, etc. La thèse cherche à analyser les éléments et les codes qui manifestent la nature, à interpréter les moyens de cette mani¬festation. La méthode appliquée dans la thèse est celle des analyses détaillées, des films de Hou Hsiao-hsien, des idées exposées dans la pensée traditionnelle chinoise sur la nature, afin de déterminer la manière dont ces conceptions de la nature sont exprimées dans le cinéma de Hou Hsiao-hsien, et expliquer les raisons pour les-quelles il en est l'héritier et comment il utilise ces idées pour créer son propre mondeThis research on the report between the narrative of the cinema of Hou Hsiao-hsien and the traditional Chinese thought has for am¬bition to aim at bringing another point de view on the construction of the cinematic narrative appropriate to Hou Hsiao-hsien whose culture lies outside the western codes, the origin of cinema. Using the film means, Hou Hsiao-hsien preserved a perception appro¬priate to the Chinese culture, which thinks the world not in terms of " being ", but " breath-energy". He creates, as would a traditio¬nal Chinese painter, infusing his works sensitivity of his own, be¬cause of his real-life experience, from his origins. For the " reading " of the cinema of Hou Hsiao-hsien, it is inevitably to return to the source, which builds the Chinese traditional artistic spirit — the nature - like the " Tao " that engender all things, but does not appro¬priate them, the nature implies a situation without forcing, which depends on nothing. It is not involved, but is in accordance with all the things by letting corne what cornes from oneself. Cinema of Hou Hsiao-hsien inherits from the nature represented in painting, and transposes it in the film domain with the representation in the content, the structure and the style: the relationship between inside and outside of the plan, the movement of camera, the construction of the filmic space, the coordination of sound and the image, etc. This research tries to analyse the elements and codes, which show the nature, to interpret the ways of this demonstration. The me¬thod applied in the research is one detailed analyses of the films of Hou Hsiao-hsien, the ideas exposed in the Chinese thought on the nature, in order to determine the way the thought of the nature expressed in the cinema of Hou Hsiao-hsien, and to explain the reasons why he is the heir and how he uses these ideas to create his own world
32
Candelier, Kévin. "Caractérisation des transformations physico-chimiques intervenant lors de la thermodégradation du bois. Influence de l'intensité de traitement, de l'essence et de l'atmosphère". Thesis, Université de Lorraine, 2013. http://www.theses.fr/2013LORR0166/document.
Streszczenie:
Le traitement thermique est basé sur la modification chimique des biopolymères par thermodégradation, en évitant l'ajout de produits chimiques. Ce traitement améliore la stabilité dimensionnelle et la durabilité fongique du bois. Ces améliorations se font au détriment des propriétés mécaniques qui ont tendance à s'affaiblir. Aujourd'hui, plusieurs types de procédés sont utilisés. Ils se distinguent entre autre par la nature du milieu dans lequelle se déroule le traitement. La durabilité de ce nouveau matériau bois est liée au degré de thermodégradation, dépendant des conditions et de l'intensité du traitement. Un pilote de traitement par conduction, travaillant sous vide ou sous azote, mesurant la masse en dynamique est utilisé afin de mieux comprendre l'influence de l'atmosphère. Les résultats obtenus montrent que l'utilisation du vide permet d'éliminer, de l'enceinte de traitement, les produits volatils formées au cours du traitement conduisant à des taux de lignine de Klason plus faibles du fait de la non recondensation des produits de dégradation. Cette limitation de recondensation des produits volatiles engendre des pertes de masse, pour une même intensité de traitement plus faibles, confirmés par des taux de polysaccharides plus élevés pour un traitement sous vide. Des études de cinétiques des réactions de thermodégradation ont confirmé la plus grande sensibilité des feuillus vis-à-vis de la thermodégradation (comparé aux résineux). De plus, ces analyses ont permis d'identifier les principaux produits de thermodégradation du bois qui varient en fonction de l'intensité du traitement et a permis de montrer une thermosensibilité plus importante de la lignine que de l'holocelluloses pour la gamme de températures utilisée. Le fruit de ces travaux est donc une progression significative des connaissances de bases sur les mécanismes de thermodégradation et leurs relations avec les paramètres de traitementThermal treatment is based on biopolymer chemical degradation by heat transfer, without additional chemical products impregnation. This process improves the dimensional stability and the decay resistance of wood. These improvements come at the expense of wood mechanical properties of wood which weak. Several types of heating processes exist currently differing mainly by the nature of the inert atmosphere used during treatment. The durability of this new wood material is correlated to the degree of polymers thermal degradation depending on the conditions and the treatment intensity. A conducting heat treatment pilot using nitrogen or vacuum and allowing dynamic record of mass loss is used to understand better the atmosphere influence. The results show that utilization of vacuum permit the elimination of volatile products formed during heat treatment and accumulated in oven, leading to lower extractives and Klason lignin contents due to the non recondensation of thermal degradation products. Limitation of the formation of recondensation products generates a lower mass loss for same treatment intensity and explains the lower polysaccharides degradation during a vacuum process. Fine chemical analyses and the study about thermal degradation reaction kinetics have allowed confirming the higher sensibility of hardwood than softwood to thermal degradation. In addition, these analyses have permitted the volatile thermal degradation products identification related to the treatment intensity. Subsequently, results have shown a higher thermal sensibility of lignin than holocelluloses for temperatures below 230°C. This work is a significant increase in basic knowledge about the mechanisms of wood thermal degradation and their relations with the processing parameters
33
Chen, Ken-Min, i 陳耿民. "Video Search Using Video Clips and Color String Transformation Analysis". Thesis, 2015. http://ndltd.ncl.edu.tw/handle/23306765813545081954.
Streszczenie:
碩士國立臺北大學
通訊工程研究所
103
Large volume video analytics is a commonly discussed topic in the current digital age. Each industry has its own type of video data, and analyzing these video data is regarded as an essential procedure for detecting the relevant impact factors. Currently, Large volume video analytics involves various problems, such as problems in the pattern of video data and search performance. Addressing these problems is not only an industrial development requirement but also a relevant topic for academic research. This paper presents a rapid and accurate method for associative searching in big image data from security monitoring. The Full-Text searching method, which is now an entirely developed technique, searches the relevant image information in a massive image database. In addition, this paper proposes Color to String Transformation Analysis (CoSTA) for transforming a color feature into a text string of a continuous image object. Moreover, to help users find appropriate information from a large volume video database quickly and automatically, this video searching system provides a user interface for accelerating the search time.
34
Chang, Rong-Jie, i 張榮傑. "Video Style Transformation Based on Semantic Segmentation". Thesis, 2017. http://ndltd.ncl.edu.tw/handle/xf4n7f.
Streszczenie:
碩士國立交通大學
多媒體工程研究所
106
Most applications about artistic style transfer for videos, which based on deep learning, only extract features from a single style image to do texture synthesis. Even if they use two style images, the results still blend without rules. This design preserves the style to be identical in the whole video, but it loses the creativity and selectivity for users. Therefore, in this thesis we segment foreground objects and background, and then apply different styles respectively. We use a fully convolutional neural network to perform semantic segmentation. We increase the reliability of the segmentation, and use the information of segmentation and the relationship between foreground objects and background to improve segmentation iteratively. We also use segmentation to improve optical flow, and apply different motion estimation methods between foreground objects and background. This improves the motion boundaries of optical flow, and solves the problems of incorrect and discontinuous segmentation caused by occlusion and shape deformation.
35
紀宏勳. "Adaptive Accordion Transformation based video compression method on HEVC". Thesis, 2016. http://ndltd.ncl.edu.tw/handle/78850759570996940425.
Streszczenie:
碩士國立交通大學
資訊科學與工程研究所
104
Fast processing speed and high compression ratio are always expected for video coding, especially for dealing with the increase of video resolutions and the demand of high quality. However, it is hard to compromise between each other since high compression ratio usually requires high coding complexities. Ouni et al. proposed a novel method called accordion-based (ACC) coding in which multiple video frames are combined into an accordion-like representation for compression and it can achieve high compression ratio with low coding complexity. Its coding efficiency is close to H.264/AVC for low-motion video at high bit-rates. However, it may no longer have benefit when applying the ACC to HEVC because HEVC has much better coding efficiency than H.264/AVC. Besides, it is not likely that all the frames in a video sequence are low-motion and thus suitable for ACC coding. To cope with these problems, in this thesis we propose an adaptive method which dynamically switches between accordion-based coding and traditional HEVC coding according to the characteristics of video frames. The experiment result shows that the proposed method can achieve up to 21.1% of total bit-rate saving and 58.6% of encoding time saving, compared to HEVC.
36
Wang, Xi. "Lecture Video Transformation through An Intelligent Analysis and Post-processing System". 2021. https://scholarworks.umass.edu/masters_theses_2/1078.
Streszczenie:
Lecture videos are good sources for people to learn new things. Students commonly use online videos to explore various domains. However, some recorded videos are posted on online platforms without being post-processed due to technology and resource limitations. In this work, we focus on the research of developing an intelligent system to automatically extract essential information, including the main instructor and screen, in a lecture video in several scenarios by using modern deep learning techniques. This thesis aims to combine the extracted essential information to render the videos and generate a new layout with a smaller file size than the original one. Another benefit of using this approach is that the users may save video post-processing time and costs. State-of-the-art object detection models, an algorithm to correct screen display, tracking the instructor, and other deep learning techniques were adopted in the system to detect both the main instructor and the screen in given videos without much of the computational burden.
There are four main contributions:
1. We built an intelligent video analysis and post-processing system to extract and reframe detected objects from lecture videos.
2. We proposed a post-processing algorithm to localize the frontal human torso position in processing a sequence of frames in the videos.
3. We proposed a novel deep learning approach to distinguish the main instructor from other instructors or audiences in several complex situations.
4. We proposed an algorithm to extract the four edge points of a screen at the pixel level and correct the screen display in various scenarios.
37
Chang, Hon-Hang, i 張閎翰. "Irregular Image Transformation and Balanced Error Distribution for Video Seam Carving". Thesis, 2017. http://ndltd.ncl.edu.tw/handle/66233893384606489158.
Streszczenie:
博士國立中央大學
資訊工程學系
105
In recent years, more and more image retargeting techniques have been proposed to facilitate our daily life, in particular those based on the use of seam carving, warping or the combination of them. Although these techniques are rather sophisticated, they only work for a specific pattern during retargeting. For example, these techniques can only retarget the source picture into the same shape of a square, but cannot be easily reshaped into a circular, a polygon or other shapes. This paper focuses on creating a graphics editing system, named CMAIR (Content and Mask-Aware Image Retargeting), for image retargeting, which can retarget the source images into diff erent shapes of image to highlight the salient objects of primary interest. CMAIR eff ectively supports removal of unimportant pixels, and frames as many surrounding objects inside the provided mask as possible. In this paper, we propose a unique irregular interpolation method to produce four possible target images, and an evaluation mechanism to decide the best candidate image as the final output with the consideration of image saliency. The results show that not only the source image can be placed into different targeted shapes of mask, but also the salient objects are retained and highlighted as much as possible. As a result, the salient objects become more clear in our eyes. Besides, a video retargeting method named BED is proposed in this study, and the proposed algorithm in this thesis focuses on maintaining the structure of straight lines and irregular shape of objects without deforming complex image contents, which may be altered in traditional seam carving of complex image or video. In addition, the proposed mechanism maintains visual continuity such that the resulting videowill not look shaky due to sudden changes in the background. Practical applicability of the proposed method was tested using both regular videos and special videos which contain vanishing lines (i.e., perspective eff ects). Experimental results demonstrate that the proposed CMAIR can convert the rectangular image to another irregular shape of image, and all the salient objects of the targeted images are preserved. In our video results using BED, the BED approach not only resizes the video with the retention of important information, but also maintains the structural properties of objects in varios kinds of videos. The demonstration website at http://video.minelab.tw/DETS/ EDSeamCarving/ and http://video.minelab.tw/DETS/VRDSF/ provides comparison results that illustrate the contribution of our method.
38
Chen, Chii-Jen, i 陳啟禎. "Region-based Video Retrieval Using Watershed Transformation and Region Adjacency Graph". Thesis, 2001. http://ndltd.ncl.edu.tw/handle/20064691487148607192.
Streszczenie:
碩士國立中正大學
資訊工程研究所
89
In this paper we adopt the idea of region-based image retrieval into the video domain and propose an effective region-based video retrieval method. The goal of region-based video retrieval is to find the frames in an image sequence containing regions that match with the regions of the query image object having maximal similarity in region features and region adjacency relations. The main idea of our method is to combine the watershed transformation and the region adjacency graph (RAG). Each frame in an image sequence is first divided into several meaningful regions by the watershed transformation. After the watershed transformation, these regions and their spatial relationships of each frame will be represented with an RAG. In an RAG, a node represents a region and the spatial relationship of two neighboring regions is represented by an edge. In the retrieval processing, we adopt an efficient graph-matching algorithm to compare the RAG of a query image with the RAG of each frame. In order to improve the query time for the video retrieval, the scene change detection is adopted in the proposed method. In the new scene change detection method, the RAGs for neighboring frames are compared to decide whether a scene change occurs. To increase the accuracy rate for the scene change detection, two new smaller subRAGs, addition and deletion subRAGs depending on the addition and the deletion for the nodes and edges, can be generated from two neighboring RAGs. The evaluation of the similarity between two RAGs is to combine the distance score between the query image and key frame and these two subRAG’s distance scores. It is quite effective for our proposed method in experimental results on several test video sequences.
39
Hsu, Chih-Chiang, i 許志強. "Video Watermarking System Based on Hybrid Transformation Domain Technology and SVD". Thesis, 2018. http://ndltd.ncl.edu.tw/handle/zbjrka.
Streszczenie:
碩士國立虎尾科技大學
資訊工程系碩士班
106
Now the technology developed, so that the information is acquired more fast, it only needs to enter keywords on the search engine to find the file, pictures or video. Hence, the protection of intellectual property is more and more important in the society. The most common way for creators to protect their properties is digital watermarking technology. Using digital watermarking technology, the work of creator can be identified and it can prevent the attack by vandalism. In order to discuss the copyright owner and protect the intellectual property, in this thesis will focus on invisible digital watermarking based on transformation domain to achieve the purpose. A systematic framework of this thesis is based on group of pictures to build a robust video watermarking. First, a video sequence is decomposed into frames, taking some consecutive frames as a group. Each frame within a group be transformed into one-level discrete wavelet transform. Next, low frequency band (LL1) is separated into number of blocks which will transform into DCT. Then DC value of each block is picked and consisted of some DC value matrices. Each DC value matrix will be a singular value decomposition and do embed the watermark by means of the proposed procedures. In addition, in order to achieve the security of watermark, the watermark is prepermuted by using chaotic encryption. After encryption process, it can make the watermark embedding more robust. The experimental results of the presented system can be found that the proposed system is robust against noises, filtering, geometric rotation, and compression attacks with a good robustness and invisibility. Keywords: image hiding, groups of pictures (GOP), digital video watermarking, discrete wavelet transform (DWT), discrete cosine transform (DCT), singular value decomposition (SVD).
40
Chang, Chia-Hua, i 張家華. "A Power-Saving Scheme Using Adaptive Color Transformation for Video on OLED Displays". Thesis, 2016. http://ndltd.ncl.edu.tw/handle/46357469852671702454.
Streszczenie:
碩士國立臺灣科技大學
電子工程系
104
Displays based on organic light emitting diodes (OLEDs) is an emerging technology that has been widely used in mobile devices. It incorporates a varying power-demand character, which particularly inefficient for displaying bright colors. This thesis proposes a scheme that preserve hue information and reduce power consumption for video sequences on OLED displays based on the pixel dimming transformation. The dimming scheme uses the coefficient derived from the hue-saturation-value (HSV) representation and the luminance of the frame to modify each pixel. Thus, the proposed scheme allows the data adjustment directly on the red, green, and blue intensity of the contents. The temporal information between each frame is adopted to reduce the computation for video sequence processing. According to the measurement of several video sequences on an OLED display, up to 73% of displaying power can be reduced with mean visual saliency index of 0.961.
41
"The Metamorphosis of Performance: Oral Heritage and Medial Transformation in Kanywood Video Films". Berlin : Humboldt-Universität zu Berlin, 2020. http://d-nb.info/1215570325/34.
42
Li, Hao, i 李晧. "Building Around Video Monitoring System Using Multiple Fish-Eye Cameras and Top-View Transformation Stitching". Thesis, 2014. http://ndltd.ncl.edu.tw/handle/08832387619384204842.
Streszczenie:
碩士國立臺北大學
資通科技產業碩士專班
102
Constant innovation in traffic and vehicle safety has prompted attention to the issue of blind spots around the vehicles during driving. Extensive research concerning driver assistance systems has been conducted and the blind areas around a vehicle have been determined to constitute a main threat to traffic safety. To address the problem of blind spots, some manufacturers install four cameras around the vehicle and build a top-view image of the surrounding area that is shown on an interior display. However, many such systems exhibit defects and blind areas remain. This study involved constructing a 360◦ top-view image of a vehicle by using multiple sh-eye cameras. The system consists of three components: distortion calibration of the fish-eye lenses, top-view image transformation, and merging of four images. We used Ration Function to implement the calibration and used matrix to transform the image to top-view, then utilized the property of matrix to reduce the error to complete the 360◦ image.
43
CHEN, HSUEH-YUAN, i 陳雪源. "Business Transformation and Business Model Design of Audio/Video Multimedia - A Case Study of Formosa Multimedia". Thesis, 2017. http://ndltd.ncl.edu.tw/handle/agqcdd.
Streszczenie:
碩士東海大學
高階經營管理碩士在職專班
105
Following the rapid development of Internet and the new trend of social live-stream media, usage of digital media of the general public has changed and many new business models are emerging as a result. The subject of this case study adapted a business model of “recording videos of public interests and sharing with the general public”, which created financial pressure from prolonged expenses without proper incomes. This study intends to discuss directions of innovation transformation and design practical new business models for the enterprise under examination, and allow the subject to achieve the goal of a successful business transformation. The study incorporated design of Dominant Innovation, workflow of Innovation and Entrepreneurship, and design of business model. In the first stage, innovation gaps in customer’s need are identified by applying the scenario analysis of gaps in dominant innovation workflow. In the second stage, “exploration of potential customers” in the workflow of “Innovation and Entrepreneurship” was applied, and assumptions of different business models were tested and verified, and scalable business model with sustainable profit were sought and designed. In the end of the study, a practical business model of potential direction of innovation transformation is successfully designed: by converting current audio/video service provider to a value-added integrated service provider of audio/video live-streams, and transforming its business model from “A Studio for Video of Public Interests” to “A Communities’ Audio/Video Communication Platform that Support Cooperation between Civic Movement Groups and Businesses.”
44
Tsai, Yi-Lin, i 蔡易霖. "Design of 2-D Inverse Transformation for Multi-Standard Video Coding Applications and Its Prototype System". Thesis, 2008. http://ndltd.ncl.edu.tw/handle/75422605705154193868.
Streszczenie:
碩士國立成功大學
電機工程學系碩博士班
96
Recently years, video compression technologies have received increasing attention. Many video compression standards such as MPEG-2, H.264/AVC and VC-1 have been proposed, therefore, many consumer digital products will support multi- standard video decoding. Alternatively we can design IPs independently for each standard and then combine them intuitively with little effort. However this may results in high hardware cost and low utilization. In this thesis we propose an architecture which supports multi-standard inverse-transformation, including MPEG-2, H.264/AVC and VC-1. In our design, we adopt two 1-D inverse-transformation (1×4) circuit to address 8×8 inverse discrete cosine transformation(IDCT) in MPEG-2, 4×4 inverse integer transformation in H.264/AVC and 8×8, 8×4, 4×8 and 4×4 inverse integer transformation in VC-1. Moreover, the multipliers are replaced with shifters and adders to further reduce hardware cost. We implement our circuit with Verilog, and then synthesize our design by using TSMC 0.18 �慆 CMOS technology. The maximum operating frequency of our design is 108 MHz and our circuit can real-timely decode video sequence under 2K1080 resolution. In order to integrate our design into multi-standard video decoding system, we use ARM RealView Platform Baseboard as our HW/SW co-simulation platform. First, we additionally design an AHB slave interface and Linux driver for our design. As for software we choose U-boot and embedded Linux as our boot-loader and operation system (OS) respectively. To achieve HW/SW co-simulation, we replace the source code of inverse transform in MPlayer by the Linux driver of our inverse transform circuit. It means that the operations of inverse transform are accomplished by the HW IP instead of software. From the experimental result, the decoding time can be reduced by 29% after our replacement. Moreover, the oncoming designs for multi-standard video decoding can also be integrated into this HW/SW co-simulation platform.
45
CHEN, YI-KAI, i 陳佾塏. "Semi-automatic 2D to 3D Video Conversion Technique Based on Regional Homographic Transformation for Background Sprite Generation". Thesis, 2018. http://ndltd.ncl.edu.tw/handle/6s7vfr.
Streszczenie:
碩士國立中正大學
電機工程研究所
106
This paper presents a novel semi-automatic 2D to 3D technology which makes the quality of depth map better by slightly human intervention. In here we divide the video into foreground and background, and generate the depth information separately through different algorithms, finally combine both of them to form the depth map corresponding to the input images. In foreground and background separation part, the key frames will be separated into foreground and background region through the graph cut algorithm, on the other hand for non-key frames we use label propagation to achieve it. In background depth generation, regional homographic transformation are calculated through the background regions at each frame, and integrated into the background Sprite model through the transformation. After user manually draws the depth map for the background Sprite model, the depth information can be retrieved by corresponding inverse transform to generate a sequence of background depth maps. In foreground depth generation, after the superpixel segmentation is performed through the foreground region, superpixel matching is used to match the (foreground region) super pixel set of the adjacent image. By manually drawn foreground depth information for key image we can propagate depth information to the non-key frames through the relationship between super pixel set of the adjacent image. Finally we can integrate the background and foreground depth information to complete depth map of the sequence of images.
46
Castro, Bernardo Braga e. "Digital transformation in recruitment : best practices in the Portuguese market". Master's thesis, 2019. http://hdl.handle.net/10400.14/29072.
Streszczenie:
The “war for talent” is leading organizations to focus on recruitment process agility and employer branding as a way to successfully recruit the best individuals. For this, companies are increasingly turning to implementing new technological developments in their recruitment and selection processes. This dissertation focuses on identifying the impact these technologies can cause, and what the best practices are for implementing them into recruitment processes, from the perspective of the internal recruiters. For this, a qualitative analysis was conducted through researching existing literature and conducting semi-structured interviews with recruiters. The results show that the implementation of automatic CV screening, asynchronous video interviewing and assessment games have a positive impact on recruitment processes, namely through increased accuracy of assessment, shortening the process duration, increasing diversity among recruits and enabling higher candidate pools. Companies are also focusing on increased software integration and gathering of recruitment metrics for continuous process improvement. For the successful implementation of these changes, recruiters see organizational culture as a key factor.A “guerra pelo talento” está a levar a que as organizações se foquem na agilidade do processo de recrutamento e em employer branding para recrutar os melhores candidatos. Para tal, as empresas estão a recorrer cada vez mais à implementação de novas tecnologias nos seus processos de recrutamento e seleção. Esta dissertação foca-se em identificar o impacto que estas tecnologias podem causar, e quais as melhores práticas para a sua integração em processos de recrutamento da perspetiva dos recrutadores internos. Para tal, uma análise qualitativa foi conduzida através da investigação da literatura existente e da condução de entrevistas semiestruturadas com recrutadores. Os resultados mostram que a implementação de triagem de CV automática, entrevistas em vídeo assíncronas e jogos de avaliação têm um impacto positivo em processos de recrutamento, nomeadamente através de um aumento na precisão das avaliações, encurtamento da duração do processo, aumento da diversidade entre recrutados e permitir um volume de candidaturas maior. As empresas também se estão a focar em aumentar a integração de software e a coleta de métricas de recrutamento para melhoria contínua dos processos. Para a implementação bem-sucedida destas alterações, os recrutadores vêm a cultura organizacional como um fator chave.
47
Liu, William. "Moving last squares registration in computer vision: new applications and algorithms". Thesis, 2017. http://hdl.handle.net/2440/111454.
Streszczenie:
Registration is a fundamental task in computer vision, and is often used as a preliminary step in diverse applications. In the process of registration, the transformation model needs to be estimated to establish the correspondence relationships between input images. Most transformation models are built upon certain assumptions. However, in practice, when given uncharacteristic data, applying such a model may result in critical deviations/artifacts in the registration output. The research conducted in this thesis focuses on the step of transformation model estimation in registration problems, where the underlying model assumptions do not hold. A central theme of this thesis is the usage of moving least squares (MLS) technique to handle violations to model assumptions. This thesis contributes in three specific applications: radial distortion estimation, image stitching and video stabilization. First, real cameras approximate ideal pinhole cameras using lenses and apertures. This leads to radial distortion effects that are not characterizable by the standard epipolar geometry model and impacts the efficacy of point correspondence validation based on the epipolar constraint. Many previous works deal with radial distortion by augmenting the epipolar geometry model with additional parameters such as distortion coefficients and centre of distortion. In this thesis, radial distortion is treated as a violation to the basic epipolar geometry. To account for the distortion effects, the epipolar geometry is adjusted via the MLS approximation combined with M-estimators to allow robust matching of interest points under severe radial distortion. Compared to previous works, the proposed method is much simpler and exhibits a higher tolerance in cases where the exact model of radial distortion is unknown. Secondly, spatially varying warps are increasingly popular for image alignment as alternatives to homographic warps, since the basic homography model carries the assumptions that images were taken under pure rotational motions, or that the scene is sufficiently far away such that it is effectively planar { conditions unlikely to be satisfied in casual photography. However, estimating spatially varying warps requires a sufficient number of feature matches. In image regions where feature detection or matching fail, the warp loses guidance and is unable to accurately model the true underlying warp, thus resulting in poor registration. This thesis proposes a correspondence insertion method for As-Projective-As-Possible (APAP) warps, which are extensions of MLS to the projective setting. The proposed method automatically identifies misaligned regions, and inserts appropriate point correspondences to increase the flexibility of the warp and improve alignment. Unlike other warp varieties, the underlying projective regularization of APAP warps reduces overfitting and geometric distortion, despite increases to the warp complexity. Lastly, video stabilization is achieved by estimating the camera trajectory throughout the video and then smoothing the trajectory. In practice, most approaches directly model and filter the camera motion using 2D image transforms (e.g., affine or projective). From the smoothed motions, update transforms are obtained to adjust each frame of the video such that the overall sequence appears to be stabilized. However, the update transform is also customarily defined by the basic 2D transforms, which cannot preserve the image contents well. As a result the stabilized videos often appear distorted and “wobbly". Therefore, estimating good update transforms is more critical to success than accurately modeling and characterizing the motion of the camera. Based on this observation, this thesis proposes homography fields for video stabilization. A homography field is a spatially varying warp that is regularized to be as projective as possible, so as to enable accurate warping while adhering closely to the underlying geometric constraints. It has been shown that homography fields are powerful enough to meet the various warping needs of video stabilization, not just in the core step of stabilization, but also in video inpainting. This enables relatively simple algorithms to be used for motion modelling and smoothing. Results on various publicly available testing videos demonstrate the merits of the proposed video stabilization pipeline.Thesis (Ph.D.) -- University of Adelaide, School of Computer Science, 2017.
48
Laber, Carina. "Digital transformation in the german healthcare industry : an analysis of the video consultation (teledoctor) and how it can shape the german healthcare industry". Master's thesis, 2019. http://hdl.handle.net/10400.14/27005.
Streszczenie:
The healthcare industry is currently undergoing a digital transformation. Thereby, efficiency and accessibility between physicians and patients shall be improved by innovative care and treatment concepts. One of these innovative concepts is the telemedicine and in particular the video consultation which enables a location independent treatment of patients through information and communication technology. However, this kind of digital medical treatment is currently not properly available in Germany. Therefore, this exploratory study deals with the current status and potential of video consultation in Germany, the challenges and derives potential impacts of the video consultation. The findings reveal that the legal framework of the video consultation, inappropriate reimbursement, acceptance within patients and physicians and no adequate expanded telematic infrastructure are the main challenges that hinder the further development of the video consultation. At the same time, an educated guess showed that a potential size of video consultation based on physicians and patient’s acceptance exists. The video consultation and its connected features will shift the physical based healthcare system to a more online focused and patient centered system which in return will affect all involved stakeholder. Patients will have better access to medical care and physicians will have more efficient practice processes and more flexible working models. In order to adapt to the digital change of society, physicians should provide VC and healthcare insurance companies should support it.A indústria da saúde está, atualmente, a passar por uma transformação digital. Deste modo, a eficiência e a acessibilidade entre médicos e pacientes serão melhoradas através de conceitos inovadores de cuidados e tratamentos. Um destes conceitos inovadores é a telemedicina e, em particular, a videoconferência, que permite um tratamento independente da localização dos doentes através das tecnologias da informação e da comunicação. No entanto, este tipo de tratamento médico digital não está actualmente disponível de forma adequada na Alemanha. Portanto, este estudo exploratório lida com a situação atual e o potencial da consulta por vídeo na Alemanha, os desafios e os potenciais impactos da consulta por vídeo. Os resultados revelam que a estrutura legal da consulta em vídeo, o reembolso inadequado, a aceitação pelos pacientes e médicos e a falta de infraestrutura telemática expandida adequada são os principais desafios que dificultam o desenvolvimento futuro da consulta em vídeo. Ao mesmo tempo, uma suposição esclarecida mostrou que existe um tamanho potencial de consulta por vídeo baseado na aceitação dos médicos e pacientes. A consulta em vídeo e os recursos conectados mudam o sistema de saúde com base física para um sistema mais focado online e centrado no paciente, o que afetará todas as partes interessadas envolvidas. Os pacientes terão melhor acesso aos cuidados médicos e os médicos terão processos práticos mais eficientes e modelos de trabalho mais flexíveis. A fim de se adaptar à mudança digital da sociedade, os médicos devem fornecer VC e as companhias de seguros de saúde devem apoiá-la.
49
Будняк, Капітоліна Миколаївна. "Трансформація мультимедійного репортажу в сучасній журналістиці". Магістерська робота, 2022. https://dspace.znu.edu.ua/jspui/handle/12345/6512.
Streszczenie:
Будняк К. М. Трансформація мультимедійного репортажу у сучасній журналістиці : кваліфікаційна робота магістра спеціальності 061 "Журналістика" / наук. керівник Л. В. Чернявська. Запоріжжя : ЗНУ, 2022. 81 с.UA : Тема магістерського дослідження: Трансформація мультимедійного репортажу в сучасній журналістиці. Обсяг основного тексту: 81 сторінка. Кількість використаних джерел – 89. Мета роботи – виявити тенденцій розвитку репортажу в умовах диджиталізації медіа на прикладі конкретних мультимедійних репортажів обраних інтернет-видань, що демонструє процеси їх трансформації у сучасній журналістиці. Для досягнення мети дослідження ми виконали такі завдання: 1) ознайомилися зі специфікою та різновидами репортажів; 2) виявили мультимедійні формати, які найчастіше зустрічаються в репортажах; 3) визначили зміни до яких призводить жанрова трансформація репортажу; 4) дослідили медійний простір на наявність у ньому мультимедійних репортажів; 5) узагальнили вплив мультимедійності на процес творення контенту українськими ЗМІ. Об’єкт дослідження: матерiали мультимедійних репортажів у таких інтернет-часописах, як «Zaxid.net» та «Reporters». Предмет дослідження: мультимедійні формати в репортажах, такі як: сатитична ілюстрація, фотострічка, слайд-шоу, відесосюжет, аудіоілюстрація та аудіоверсія тексту, відеоілюстрація та відеоверсія тексту тощо; а також прийоми та технології, що застосуються під час створення контенту; його трансформаційні зміни, зумовлені диджиталізацією та попитом аудиторії. Для виконання поставлених завдань у дослідженні застосовані такі методи: аналіз, синтез, аналогія, дедукція, індукція, термінологічний аналіз, описовий метод, прогнозування. Головним методом, який ми використали у практичній частині став аналіз. Теоретичну основу дослідження складають праці таких вчених: Б. Потятиника, З. Вайшенберга, Т. Крайнікової, І. Михайлина, З. Партико, О. Нестеренко, І. Тонкіх, О. Кацан, О. Лешко, О. Ремовської, О. Холоденка, М. Чабаненко, В. Шевченко, О. Полумисної, О. Рутковського та інших. Наукова новизна результатів полягає в тому, що: вперше: здійснюється порівняльно-описовий аналіз інтернет-видань «ZAXID.NET» ТА «REPORTERS», під час якого визначаються контентні особливості їх мультимедійних репортажів; удосконалено: відео візуальну класифікацію мультимедійних форматів; набуло подальшого розвитку: дослідження форматів мультимедіа; Практичне та теоретичне значення одержаних результатів. Результати дослідження можна використовувати пiд час пiдготовки лекцiйних та практичних дисциплiн, зокрема для занять з «Інтернет-журналістики», «Сучасних інформаційних технологій», «Журналістських жанрів», «Теорії та методики журналістської творчості». Окремі елементи дослідження можуть реалізовуватися під час медійної діяльності. Оскільки застосування сучасних мультимедійних форматів та творчих прийомів допоможе створювати затребувані репортажі, спрямовані на задоволення потреб аудиторії. Також їх можна використовувати у продовженні досліджень означеної теми.
EN : Budnyak K. M. Transformation of Multimedia Reporting in Modern Journalism. Zaporizhzhia, 2021. 81 p. The diploma paper discusses the use of multimedia formats in modern multimedia reports. Actuality of the research paper is connected to the genre transformation of reporting manifested in the following: the classic features are combined with the information layout, changing approach to textual and audio-visual content. Often the report can even be submitted in the format of a microsite, i.e. a landing page with its own navigation and structure. Therefore, its transformation requires scientific research and understanding. The paper’s goal is to identify trends in the development of the portal in the context of digitalization of the media on the example of specific multimedia reports of selected online publications, which demonstrates the processes of their transformation in modern journalism. The aims are to get acquainted with the specifics and types of reports; to identify multimedia formats that are most common in reports; to identify changes that lead to the genre transformation of reporting; to explore the media space for the presence of multimedia reports; to generalize the influence of multimedia on the process of content creation by the Ukrainian media. Used methods of research are analysis, synthesis, analogy, deduction, induction, terminological analysis, descriptive method, prediction. The main method we use in the practical part was the analysis. The result of the research paper is identified the role of multimedia formats in modern multimedia reporting. The study demonstrated the difference between the use of multimedia formats in reporting publications «Zaxid.net» and «Reporters».
50
"Three dimensional DCT based video compression". 1997. http://library.cuhk.edu.hk/record=b5889195.
Streszczenie:
by Chan Kwong Wing Raymond.Thesis (M.Phil.)--Chinese University of Hong Kong, 1997.
Includes bibliographical references (leaves 115-123).
Acknowledgments --- p.i
Table of Contents --- p.ii-v
List of Tables --- p.vi
List of Figures --- p.vii
Abstract --- p.1
Chapter Chapter 1 : --- Introduction
Chapter 1.1 --- An Introduction to Video Compression --- p.3
Chapter 1.2 --- Overview of Problems --- p.4
Chapter 1.2.1 --- Analog Video and Digital Problems --- p.4
Chapter 1.2.2 --- Low Bit Rate Application Problems --- p.4
Chapter 1.2.3 --- Real Time Video Compression Problems --- p.5
Chapter 1.2.4 --- Source Coding and Channel Coding Problems --- p.6
Chapter 1.2.5 --- Bit-rate and Quality Problems --- p.7
Chapter 1.3 --- Organization of the Thesis --- p.7
Chapter Chapter 2 : --- Background and Related Work
Chapter 2.1 --- Introduction --- p.9
Chapter 2.1.1 --- Analog Video --- p.9
Chapter 2.1.2 --- Digital Video --- p.10
Chapter 2.1.3 --- Color Theory --- p.10
Chapter 2.2 --- Video Coding --- p.12
Chapter 2.2.1 --- Predictive Coding --- p.12
Chapter 2.2.2 --- Vector Quantization --- p.12
Chapter 2.2.3 --- Subband Coding --- p.13
Chapter 2.2.4 --- Transform Coding --- p.14
Chapter 2.2.5 --- Hybrid Coding --- p.14
Chapter 2.3 --- Transform Coding --- p.15
Chapter 2.3.1 --- Discrete Cosine Transform --- p.16
Chapter 2.3.1.1 --- 1-D Fast Algorithms --- p.16
Chapter 2.3.1.2 --- 2-D Fast Algorithms --- p.17
Chapter 2.3.1.3 --- Multidimensional DCT Algorithms --- p.17
Chapter 2.3.2 --- Quantization --- p.18
Chapter 2.3.3 --- Entropy Coding --- p.18
Chapter 2.3.3.1 --- Huffman Coding --- p.19
Chapter 2.3.3.2 --- Arithmetic Coding --- p.19
Chapter Chapter 3 : --- Existing Compression Scheme
Chapter 3.1 --- Introduction --- p.20
Chapter 3.2 --- Motion JPEG --- p.20
Chapter 3.3 --- MPEG --- p.20
Chapter 3.4 --- H.261 --- p.22
Chapter 3.5 --- Other Techniques --- p.23
Chapter 3.5.1 --- Fractals --- p.23
Chapter 3.5.2 --- Wavelets --- p.23
Chapter 3.6 --- Proposed Solution --- p.24
Chapter 3.7 --- Summary --- p.25
Chapter Chapter 4 : --- Fast 3D-DCT Algorithms
Chapter 4.1 --- Introduction --- p.27
Chapter 4.1.1 --- Motivation --- p.27
Chapter 4.1.2 --- Potentials of 3D DCT --- p.28
Chapter 4.2 --- Three Dimensional Discrete Cosine Transform (3D-DCT) --- p.29
Chapter 4.2.1 --- Inverse 3D-DCT --- p.29
Chapter 4.2.2 --- Forward 3D-DCT --- p.30
Chapter 4.3 --- 3-D FCT (3-D Fast Cosine Transform Algorithm --- p.30
Chapter 4.3.1 --- Partitioning and Rearrangement of Data Cube --- p.30
Chapter 4.3.1.1 --- Spatio-temporal Data Cube --- p.30
Chapter 4.3.1.2 --- Spatio-temporal Transform Domain Cube --- p.31
Chapter 4.3.1.3 --- Coefficient Matrices --- p.31
Chapter 4.3.2 --- 3-D Inverse Fast Cosine Transform (3-D IFCT) --- p.32
Chapter 4.3.2.1 --- Matrix Representations --- p.32
Chapter 4.3.2.2 --- Simplification of the calculation steps --- p.33
Chapter 4.3.3 --- 3-D Forward Fast Cosine Transform (3-D FCT) --- p.35
Chapter 4.3.3.1 --- Decomposition --- p.35
Chapter 4.3.3.2 --- Reconstruction --- p.36
Chapter 4.4 --- The Fast Algorithm --- p.36
Chapter 4.5 --- Example using 4x4x4 IFCT --- p.38
Chapter 4.6 --- Complexity Comparison --- p.43
Chapter 4.6.1 --- Complexity of Multiplications --- p.43
Chapter 4.6.2 --- Complexity of Additions --- p.43
Chapter 4.7 --- Implementation Issues --- p.44
Chapter 4.8 --- Summary --- p.46
Chapter Chapter 5 : --- Quantization
Chapter 5.1 --- Introduction --- p.49
Chapter 5.2 --- Dynamic Ranges of 3D-DCT Coefficients --- p.49
Chapter 5.3 --- Distribution of 3D-DCT AC Coefficients --- p.54
Chapter 5.4 --- Quantization Volume --- p.55
Chapter 5.4.1 --- Shifted Complement Hyperboloid --- p.55
Chapter 5.4.2 --- Quantization Volume --- p.58
Chapter 5.5 --- Scan Order for Quantized 3D-DCT Coefficients --- p.59
Chapter 5.6 --- Finding Parameter Values --- p.60
Chapter 5.7 --- Experimental Results from Using the Proposed Quantization Values --- p.65
Chapter 5.8 --- Summary --- p.66
Chapter Chapter 6 : --- Entropy Coding
Chapter 6.1 --- Introduction --- p.69
Chapter 6.1.1 --- Huffman Coding --- p.69
Chapter 6.1.2 --- Arithmetic Coding --- p.71
Chapter 6.2 --- Zero Run-Length Encoding --- p.73
Chapter 6.2.1 --- Variable Length Coding in JPEG --- p.74
Chapter 6.2.1.1 --- Coding of the DC Coefficients --- p.74
Chapter 6.2.1.2 --- Coding of the DC Coefficients --- p.75
Chapter 6.2.2 --- Run-Level Encoding of the Quantized 3D-DCT Coefficients --- p.76
Chapter 6.3 --- Frequency Analysis of the Run-Length Patterns --- p.76
Chapter 6.3.1 --- The Frequency Distributions of the DC Coefficients --- p.77
Chapter 6.3.2 --- The Frequency Distributions of the DC Coefficients --- p.77
Chapter 6.4 --- Huffman Table Design --- p.84
Chapter 6.4.1 --- DC Huffman Table --- p.84
Chapter 6.4.2 --- AC Huffman Table --- p.85
Chapter 6.5 --- Implementation Issue --- p.85
Chapter 6.5.1 --- Get Category --- p.85
Chapter 6.5.2 --- Huffman Encode --- p.86
Chapter 6.5.3 --- Huffman Decode --- p.86
Chapter 6.5.4 --- PutBits --- p.88
Chapter 6.5.5 --- GetBits --- p.90
Chapter Chapter 7 : --- "Contributions, Concluding Remarks and Future Work"
Chapter 7.1 --- Contributions --- p.92
Chapter 7.2 --- Concluding Remarks --- p.93
Chapter 7.2.1 --- The Advantages of 3D DCT codec --- p.94
Chapter 7.2.2 --- Experimental Results --- p.95
Chapter 7.1 --- Future Work --- p.95
Chapter 7.2.1 --- Integer Discrete Cosine Transform Algorithms --- p.95
Chapter 7.2.2 --- Adaptive Quantization Volume --- p.96
Chapter 7.2.3 --- Adaptive Huffman Tables --- p.96
Appendices:
Appendix A : The detailed steps in the simplification of Equation 4.29 --- p.98
Appendix B : The program Listing of the Fast DCT Algorithms --- p.101
Appendix C : Tables to Illustrate the Reording of the Quantized Coefficients --- p.110
Appendix D : Sample Values of the Quantization Volume --- p.111
Appendix E : A 16-bit VLC table for AC Run-Level Pairs --- p.113
References --- p.115