Дисертації з теми "Image moment"
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1
Davis, Clayton Paul. "Understanding and Improving Moment Method Scattering Solutions." Diss., CLICK HERE for online access, 2004. http://contentdm.lib.byu.edu/ETD/image/etd620.pdf.
2
Diaz, Angelica Maria. "Optimal image deconvolution by range and noise moment constraints." FIU Digital Commons, 2005. http://digitalcommons.fiu.edu/etd/2799.
Анотація:
Image deconvolution, also known as image restoration, is concerned with the estimation of an uncorrupted image from a noisy, degraded one. The degradation of this image may be caused by defects of optical lenses, nonlinearity of the electro-optical sensor, relative motion between an object and camera, wrong focus, etc. By assuming a degradation model, one can formulate and develop a restoration algorithm. In this thesis, the developed algorithms are iterative deconvolution methods based on noise moment and pixel range constraints. The moments were used to ensure that noise associated with the deconvolution solution satisfies predetermined statistics. The pixel range constraints were also used to ensure the solution is within predetermined pixel value bounds. This addresses the critical issue of noise amplification at those frequencies where the point-spread function (the blurring function) contains frequency nulls. The solution’s dependence on the number of moments is examined and the performance of the deconvolution approach is compared with existing and well established deconvolution methods such as Wiener filtering and inverse filtering.
3
Obaid, Mohammad Hisham Rashid. "Moment Based Painterly Rendering Using Connected Color Components." Thesis, University of Canterbury. Computer Science and Software Engineering, 2006. http://hdl.handle.net/10092/1132.
Анотація:
Research and development of Non-Photorealistic Rendering algorithms has recently moved towards the use of computer vision algorithms to extract image features. The feature representation capabilities of image moments could be used effectively for the selection of brush-stroke characteristics for painterly-rendering applications. This technique is based on the estimation of local geometric features from the intensity distribution in small windowed images to obtain the brush size, color and direction. This thesis proposes an improvement of this method, by additionally extracting the connected components so that the adjacent regions of similar color are grouped for generating large and noticeable brush-stroke images. An iterative coarse-to-fine rendering algorithm is developed for painting regions of varying color frequencies. Improvements over the existing technique are discussed with several examples.
4
Robinson, Matthew J. "Simultaneous lift, moment and thrust measurement on a scramjet in hypervelocity flow /." [St. Lucia, Qld.], 2003. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17611.pdf.
5
Erkers, Julia. "Towards automatic smartphone analysis for point-of-care microarray assays." Thesis, Uppsala universitet, Institutionen för biologisk grundutbildning, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-280663.
Анотація:
Poverty and long distances are two reasons why some people in the third world countries hasdifficulties seeking medical help. A solution to the long distances could be if the medical carewas more mobile and diagnostically tests could be performed on site in villages. A new pointof-care test based on a small blood shows promising results both in run time and mobility.However, the method still needs more advanced equipment for analysis of the resultingmicroarray. This study has investigated the potential to perform the analysis within asmartphone application, performing all steps from image capturing to a diagnostic result. Theproject was approach in two steps, starting with implementation and selection of imageanalysis methods and finishing with implementing those results into an Android application.A final application was not developed, but the results gained from this project indicates that asmartphone processing power is enough to perform heavy image analysis within a sufficientamount of time. It also imply that the resolution in the evaluated images taken with a Nexus 6together with an external macro lens most likely is enough for the whole analysis, but furtherwork must be done to ensure it.
6
Alves, Jorge Amaral. "Recognition of ship types from an infrared image using moment invariants and neural networks." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2001. http://handle.dtic.mil/100.2/ADA389842.
7
Paschalakis, Stavros. "Moment methods and hardware architectures for high speed binary, greyscale and colour pattern recognition." Thesis, University of Kent, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246603.
8
Kolluri, Murali Mohan. "Developing a validation metric using image classification techniques." University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1406819893.
9
Tournier-Lasserve, Catherine. "Modeles d'analyse et de synthese de textures homogenes et inhomogenes." Paris 6, 1987. http://www.theses.fr/1987PA066649.
Анотація:
Ce travail presente quelques modeles d'analyse et de synthese de textures planes. On analyse tout d'abord une modelisation statistique par un ensemble restreint des moyennes d'espace du second ordre efficace pour les textures homogenes. Pour les textures inhomogenes, il a fallu envisage une autre modelisation basee sur les moments tripolaires, utile pour retrouver les structures de telles textures. Les modeles ont ete etendus aux textures couleur apres les avoir codees. Enfin, ces modeles ont ete enrichi afin de realiser des syntheses au niveau macroscopique sur des textures fortement structurees
10
Huang, Mu-Ching. "La couleur de la vacuité : analyse de l'esthétique zen du style cinématographique de Yasujiro Ozu." Thesis, Paris 10, 2018. http://www.theses.fr/2018PA100145.
Анотація:
Il existe deux approches, culturelle et cinématographique, dans les recherches sur Ozu. En réponse au conflit entre les deux, nous proposons de retourner plus profondément aux idées essentielles du bouddhisme Zen qui affectent la culture et l’esthétique traditionnelles japonaises, pour obtenir un nouveau regard sur la richesse et la profondeur de son cinéma. Le style du « ni s’attacher ni quitter » d’Ozu vient de la pensée bouddhiste « La couleur même est la vacuité. » « Couleur » signifie « phénomène », le bouddhisme affirme que dans l’univers de vacuité, tout phénomène est changeant et temporaire, à savoir impermanent. Dans notre recherche, nous analyserons comment Ozu nous permet d’apercevoir et de comprendre la réalité de l’impermanence de l’univers et de la vie, à travers l’arrangement d’éléments du vide et du plein, et nous inspire à chérir la compagnie des émotions humaines dans la vie impermanente. Nous constaterons que c’est juste l’interpénétration entre le vide et le plein, entre l’absence et la présence, qui fait naître dans le cinéma d’Ozu une tension qui nous touche. Et son cinéma est pour ainsi dire une manifestation de « la couleur de la vacuité »There are two approaches, cultural and cinematographic, in the study of Yasujiro Ozu’s films. In response to the conflict between the two, and to view the richness and depth of Ozu’s works from a new perspective, I propose to return to Zen Buddhism ideas, which are deeply rooted in Japanese culture and aethetics. Ozu’s style of “neither attaching nor quitting" comes from the Buddhist idea that "Color is Emptiness”. "Color" means "phenomenon"; Buddhism asserts that in the universe of Emptiness, all phenomena are changeable and temporary, namely, impermanent. In my research, I will analyze how Ozu, by arranging elements of emptiness and fullness, reveals to us that impermanence is the reality of universe and life, and inspires us to cherish our companies in the impermanent life. We will find that it is the interpenetration of emptiness and fullness, of absence and presence, which give rise to the tension in Ozu’s films. And these films are the manifestation of “the Color of Emptiness”
11
Fracarolli, Juliana Aparecida 1984. "Utilização do biospeckle laser na avaliação do potencial germinativo de sementes de ipê-roxo (Tabebuia heptaphylla) (Vellozo) Toledo." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/256884.
Анотація:
Orientadores: Inacio Maria Dal Fabbro, Leila MartinsDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Agrícola
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Resumo: O ipê-roxo (Tabebuia heptaphylla (Vellozo) Toledo) é uma espécie de alto valor econômico, ornamental e medicinal, pertencente à família Bignoniaceae, cuja multiplicação ocorre prioritariamente por sementes. Há considerável necessidade de estudos sobre o desempenho fisiológico das unidades de dispersão dessa e de outras espécies florestais. O objetivo desse trabalho foi avaliar a potencialidade do biospeckle, técnica baseada no fenômeno óptico de interferência, como ferramenta de caracterização do potencial germinativo das sementes de ipê-roxo. A quantificação do biospeckle foi expressa através do cálculo do Momento de Inércia (MI). Foram utilizados laser vermelho (632 nm de comprimento de onda) e 10 mW de potência, câmera filmadora digital e computador. Foram realizados cinco experimentos, a saber: (1) Avaliação de danos térmicos em sementes através do biospeckle; (2) Avaliação da interferência do tegumento na sensibilidade do biospeckle; (3) Diferenciação entre sementes germinadas e não germinadas através do biospeckle; (4) Determinação da faixa de umidade das sementes para a melhor interação entre o laser e a semente para o biospeckle; (5) Avaliação de sementes de ipê-roxo submetidas ao envelhecimento acelerado através do biospeckle. Para os experimentos 1, 2, 3 e 4 as sementes foram hidratadas até atingirem grau de umidade de 69%, divididas em quatro sub-amostras sendo que duas delas foram submetidas ao congelamento. Em seguida as sub-amostras foram separadas em 5 níveis de umidade (28, 35, 54, 63, 69%) e iluminadas com laser. Nesses ensaios foram planejados quatro tratamentos: (1) sementes sem tegumento; (2) sementes com tegumento; (3) sementes sem tegumento submetidas a congelamento a 0°C e (4) sementes com tegumento submetidas ao congelamento a 0°C. Os resultados permitem afirmar que é possível diferenciar as sementes que sofreram dano térmico daquelas que não sofreram através do biospeckle. A presença do tegumento interfere na sensibilidade do biospeckle. É possível diferenciar as sementes viáveis das inviáveis através do biospeckle. Do experimento 4 obteve-se uma correlação positiva entre os valores de MI e de umidade das sementes. Verificou-se também que a faixa de teor de água para a melhor interação entre o laser e a semente de ipê-roxo está entre 28 e 54%. Esta faixa de umidade das sementes foi utilizada como referência para o experimento 5. No experimento 5 as sementes foram submetidas ao envelhecimento acelerado (42°C e umidade relativa do ar de 100 % durante 24, 48, 72, 96 e 120 horas) e avaliadas através da técnica do biospeckle e teste de germinação. Obteve-se que é possível detectar a redução de viabilidade e vigor das sementes de T. heptaphylla ocasionada pelo envelhecimento acelerado. Dessa forma, o biospeckle é uma técnica que vem sendo desenvolvida e apresenta-se como uma ferramenta possível para avaliar o potencial germinativo das sementes de ipê-roxo
Abstract: Ipê-roxo (Tabebuia heptaphylla (Vellozo) Toledo) is considered of very important economical, ornamental, as well as medicinal value which is included in the Bignoniaceae botanical family which multiplication is quite solely carried by seeds. Forest dispersion elements, i.e., the seeds, deserve a deep understanding of their physiological performance. The objective of this research work was to evaluate a biospeckle method potential in testing seed viability, which is based on the laser interferometry. The biospeckle phenomenon quantification was carried by means of the Moment of Inertia (MI) which formula resembles its mechanical counterpart. The equipment employed in the experimental setup included a 632 nm red diode laser of 10mW, a digital movie camera as well as a PC. The five tests carried were (1) thermal damage evaluation on seeds, (2) biospeckle sensitivity to the tegument interference, (3) differentiation between non germinated and germinated seeds evaluation by the biospeckle, (4) determination of the best seed moisture content to laser interaction and (5) evaluation of accelerated aging ipê-roxo seeds through the biospeckle. In tests 1, 2, 3 and 4 seeds were hydrated to the value of 69% and divided into four sub samples from which two of them were forwarded to freezing. Following the four sub samples were separated into five moisture level groups (28, 35, 54, 63, 69%) and exposed to the laser. Four treatments have been imposed to the experimental tests, named (1) seeds without teguments, (2) seeds with tegument, (3) frozen at 0° C seeds without teguments and (4) frozen at 0° C seeds with teguments. Results from biospeckle tests confirm the possibility of differentiating seeds with thermal damage from those without thermal damage. When the tegument is covering the seed, the sensitivity of biospeckle is affected.?It's possible to differentiate viable seeds from non viable seeds using biospeckle technique. From test (4) it is obtained a positive correlation between MI and seeds moisture content. It was also verified that seed moisture content between 28% and 54% showed better interaction with laser. That moisture content range was adopted for the test (5). Seeds were submitted to accelerated aging process in the test (5) (42°C and 100% of relative humidity for 24, 48, 72, 96 and 120 hours) following by biospeckle evaluation and germination tests. It was concluded that viability reduction of T. heptaphylla as generated by accelerated aging can be detected by the biospeckle test. Thus, the biospeckle is a technique that has been developed and is presented as a possible tool to assess the germination potential of ipê-roxo seeds
Mestrado
Maquinas Agricolas
Mestre em Engenharia Agrícola
12
Myška, Michal. "Sledování objektů v obrazech pořízených vysokorychlostní kamerou." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417066.
Анотація:
This master thesis is dealing with object tracking in high-speed camera images, within what we are trying to find their trajectory and orientation. The mathematical theory associated with this problem as well as the methods used fo image processing are described here. The main outcome is an application with a user interface through which we can calculate the desired parameters of the individual objects.
13
Salama, Gouda Ismail Mohamed. "Monocular and Binocular Visual Tracking." Diss., Virginia Tech, 1999. http://hdl.handle.net/10919/37179.
Анотація:
Visual tracking is one of the most important applications of computer vision. Several tracking systems have been developed which either focus mainly on the tracking of targets moving on a plane, or attempt to reduce the 3-dimensional tracking problem to the tracking of a set of characteristic points of the target. These approaches are seriously handicapped in complex visual situations, particularly those involving significant perspective, textures, repeating patterns, or occlusion.
This dissertation describes a new approach to visual tracking for monocular and binocular image sequences, and for both passive and active cameras. The method combines Kalman-type prediction with steepest-descent search for correspondences, using 2-dimensional affine mappings between images. This approach differs significantly from many recent tracking systems, which emphasize the recovery of 3-dimensional motion and/or structure of objects in the scene. We argue that 2-dimensional area-based matching is sufficient in many situations of interest, and we present experimental results with real image sequences to illustrate the efficacy of this approach.
Image matching between two images is a simple one to one mapping, if there is no occlusion. In the presence of occlusion wrong matching is inevitable. Few approaches have been developed to address this issue. This dissertation considers the effect of occlusion on tracking a moving object for both monocular and binocular image sequences. The visual tracking system described here attempts to detect occlusion based on the residual error computed by the matching method. If the residual matching error exceeds a user-defined threshold, this means that the tracked object may be occluded by another object. When occlusion is detected, tracking continues with the predicted locations based on Kalman filtering. This serves as a predictor of the target position until it reemerges from the occlusion again. Although the method uses a constant image velocity Kalman filtering, it has been shown to function reasonably well in a non-constant velocity situation. Experimental results show that tracking can be maintained during periods of substantial occlusion.
The area-based approach to image matching often involves correlation-based comparisons between images, and this requires the specification of a size for the correlation windows. Accordingly, a new approach based on moment invariants was developed to select window size adaptively. This approach is based on the sudden increasing or decreasing in the first Maitra moment invariant. We applied a robust regression model to smooth the first Maitra moment invariant to make the method robust against noise.
This dissertation also considers the effect of spatial quantization on several moment invariants. Of particular interest are the affine moment invariants, which have emerged, in recent years as a useful tool for image reconstruction, image registration, and recognition of deformed objects. Traditional analysis assumes moments and moment invariants for images that are defined in the continuous domain. Quantization of the image plane is necessary, because otherwise the image cannot be processed digitally. Image acquisition by a digital system imposes spatial and intensity quantization that, in turn, introduce errors into moment and invariant computations. This dissertation also derives expressions for quantization-induced error in several important cases. Although it considers spatial quantization only, this represents an important extension of work by other researchers.
A mathematical theory for a visual tracking approach of a moving object is presented in this dissertation. This approach can track a moving object in an image sequence where the camera is passive, and when the camera is actively controlled. The algorithm used here is computationally cheap and suitable for real-time implementation. We implemented the proposed method on an active vision system, and carried out experiments of monocular and binocular tracking for various kinds of objects in different environments. These experiments demonstrated that very good performance using real images for fairly complicated situations.Ph. D.
14
Li, Gengxiang. "Rehaussement et détection des attributs sismiques 3D par techniques avancées d'analyse d'images." Phd thesis, Université Michel de Montaigne - Bordeaux III, 2012. http://tel.archives-ouvertes.fr/tel-00731886.
Анотація:
Les Moments ont été largement utilisés dans la reconnaissance de formes et dans le traitement d'image. Dans cette thèse, nous concentrons notre attention sur les 3D moments orthogonaux de Gauss-Hermite, les moments invariants 2D et 3D de Gauss-Hermite, l'algorithme rapide de l'attribut de cohérence et les applications de l'interprétation sismique en utilisant la méthode des moments.Nous étudions les méthodes de suivi automatique d'horizon sismique à partir de moments de Gauss-Hermite en cas de 1D et de 3D. Nous introduisons une approche basée sur une étude multi-échelle des moments invariants. Les résultats expérimentaux montrent que la méthode des moments 3D de Gauss-Hermite est plus performante que les autres algorithmes populaires.Nous avons également abordé l'analyse des faciès sismiques basée sur les caractéristiques du vecteur à partir des moments 3D de Gauss -Hermite, et la méthode de Cartes Auto-organisatrices avec techniques de visualisation de données. L'excellent résultat de l'analyse des faciès montre que l'environnement intégré donne une meilleure performance dans l'interprétation de la structure des clusters.Enfin, nous introduisons le traitement parallèle et la visualisation de volume. En profitant des nouvelles performances par les technologies multi-threading et multi-cœurs dans le traitement et l'interprétation de données sismiques, nous calculons efficacement des attributs sismiques et nous suivons l'horizon. Nous discutons également l'algorithme de rendu de volume basé sur le moteur Open-Scene-Graph qui permet de mieux comprendre la structure de données sismiques.
15
Zhu, Minglei. "Control-based design of Robots." Thesis, Ecole centrale de Nantes, 2020. http://www.theses.fr/2020ECDN0043.
Анотація:
Il est bien connu que les robots parallèles ont de nombreuses applications dans l ’industrie. Cependant, en raison de leur structure complexe, leur contrôle peut être difficile. Lorsqu'une précision élevée est nécessaire , un modèle complet du robot détaillé est nécessaire . Les approches de contrôle référencées capteurs se sont avérées plus efficaces , en termes de précision que les contrôleurs basés modèles puisqu'elles s’affranchissent des modèles de robots complexes et des erreurs de modélisation associées. Néanmoins, lors de l'application de d’un asservissement visuel , il y a toujours des problèmes dans le processus de contrôle , tels que les singularités du contrôleur . Cette thèse propose une méthodologie de conception orientée commande qui prend en compte les performances de précision du contrôleur dans le processus de conception du robot pour obtenir les paramètres géométriques optimaux de ce dernier Trois contrôleurs ont été sélectionnés dans le processus de conception du robot : les commandes basées sur l’observation des directions des jambes, les commandes basées sur l’observation des lignes et les commandes basées sur des moments dans l'image .Pour vérifier les performances en terme de précision des robots optimisés, nous avons effectué des co-simulations des robots optimisés avec les contrôleurs correspondants . En terme d’expérimentation, deux prototypes de robots DELTA ont été conçus et expérimentés afin de valider la précision du contrôleurIt is well -known that parallel robots have a lot of applications in industry for their high stiffness , high payload , can reach higher acceleration and speed . However , because of their complex structure , their control may be troublesome. When high accuracy is needed, the detailed robot model is necessary . However , even detailed models still suffer from the problem of inaccuracy in reality because of robot assembly and manufacturing errors . Sensor - based control approaches have been proven to be more efficient than model-based controllers in terms of accuracy since they overcome the complex robot models and inconsistency errors. Nevertheless, when applying the visual servoing, there are always some problems in the control process , such as the controller singularities . Thus , this thesis proposes proposes a control based design metodology which takes into account the accuracy performance of the controller in the design process to get the geometric parameters of the robot. This thesis applied the control-based design methodology to the optimal design of three types of parallel robots: Five-bar mechanisms , DELTA robots , Gough -Stewart platforms . Three types of controllers are selected in the design process : leg -direction -based visual servoing, line-baesd visual servoing and image moment visual servoing . Design optimization problems are formulated to find the geometric parameters of the robot . Co-simulations are performed to check the accuracy performance of the robots obtained from the optimization. Experiments are performed with two DELTA robot prototypes in order to validate the controller accuracy
16
Sheng, Yunlong. "Processeur optique de traitement en temps réel d'images vidéo : Application au calcul optique des moments bidimensionnels des images." Besançon, 1986. http://www.theses.fr/1986BESA2032.
Анотація:
Dispositif optique de calcul analogique des moments d'images en éclairage incohérent. Calcul en parallèle des dix premiers moments bidimensionnels de l'image grâce a une matrice de masques photographiques codant optiquement les noyaux des différentes intégrales de moments. Un microordinateur effectue les opérations de reconnaissance de formes sur ce petit nombre de caractéristiques statistiques extraites optiquement. Le processeur optique réalise est enfin utilise pour l'identification de pages manuscrites saisies en temps réel par camera vidéo et classées par un microordinateur gérant les moments des pages calculées optiquement
17
Poleto, Arthur Suzini. "Desenvolvimento de um sistema de visão de máquina para inspeção de conformidade em um produto industrial /." Ilha Solteira, 2019. http://hdl.handle.net/11449/191137.
Анотація:
Orientador: João Antonio PereiraResumo: Visão de máquina é um campo multidisciplinar que vem crescendo na indústria, que está cada vez mais preocupada em reduzir custos, automatizar processos, e atender requisitos de qualidade do produto para atender seus clientes. Processos de montagem realizados de forma manual com inspeção e controle visual são tipicamente processos susceptíveis a erros, à utilização de peças não conformes na montagem do produto final. Este trabalho apresenta uma proposta de desenvolvimento de um sistema de visão de máquina com base no processamento e análise de imagens digitais para a inspeção das características e especificações das peças e componentes utilizados na montagem de capotas marítimas, objetivando verificar e garantir a conformidade do produto final. A inspeção e avaliação da conformidade do produto são feitas por etapas com a utilização de duas câmeras, uma captura a imagem do código de identificação alfanumérico do produto e a outra inspeciona o conjunto de elementos de fixação. As imagens passam por um processo de tratamento que envolve a filtragem espacial utilizando máscara de médias para suavização, alargamento de contraste para expandir a faixa de intensidades e segmentação para formação dos objetos de interesse. Uma função de OCR é utilizada para a extração de caracteres e reconhecimento do código do produto e a extração de características específicas do conjunto de componentes de fixação é feita por descritores de forma representados pelos invariantes de momento. As caracte... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Machine vision is a growing multidisciplinary field in the industry that is increasingly concerned with reducing costs, automating processes, and meeting product quality requirements to serve its customers. Manual assembly processes with inspection and visual control are typically error-prone processes using non-conforming parts in the final product assembly. This work presents a proposal for the development of a machine vision system based on digital image processing and analysis for the inspection of the characteristics and specifications of the parts and components used in the assembly of marine bonnets, aiming to verify and ensure the conformity of the final product. Inspection and conformity assessment of the product are done in stages using two cameras, one capturing the image of the alphanumeric identification code of the product and the other inspecting the set of fasteners. The images undergo a treatment process that involves spatial filtering using averaging masks for smoothing, contrast widening to expand the range of intensities, and segmentation to form the objects of interest. An OCR function is used for character extraction and product code recognition, and the extraction of specific features of the fastener assembly is done by shape descriptors represented by the moment invariants. The specific characteristics of the fasteners are used to assess the conformity of the product with its respective code. The presentation of data and results of the implemented prop... (Complete abstract click electronic access below)
Mestre
18
Sardana, H. K. "Edge moments in pattern recognition." Thesis, University of Nottingham, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357101.
19
Stumm, Rebeca Lenize. "Enterros: momentos-específicos." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/27/27159/tde-05062011-222820/.
Анотація:
A pesquisa refletiu sobre a ação poética de Enterro, capaz de romper com a continuidade em curso da imagem, instrumentalizando, ainda, o repetir e o registrar de outros Enterros por distintas autorias. A partir do Enterro de uma obra cerâmica na Avenida Paulista, em 2007, a imagem- documento dessa ação desencadeou outros Enterros realizados sob distintas interpretações, por participantes em diferentes lugares (2007-2010). Os pensamentos de Walter Benjamin e Gilles Deleuze apoiaram o entendimento do Enterro como ação que causa estranhamento e ruptura com o que está posto, deflagrando visualizações de outras realidades possíveis. Assim, o diferencial do trabalho apontou para o potencial dos Enterros produzirem momentos específicos de transformações de sentidos à ação, produção de imagens e autoria, possibilitando ao artista retomar seu trabalho a partir do sentido construído pelo outro, agir ora como participante, ora como autor, na mesma obra, em momentos diferentes.Research centered on the poetic action of a Burial, which presents a rupture within an image and its course, while providing instruments for the repetition and documentation of other Burials by distinct contributors. The piece initiates with the Burial of ceramics work of art on Avenida Paulista, in 2007, the image-document of this act led to other Burials carried out in various guises by participants in different locations (2007-2010). Walter Benjamin and Gilles Deleuze support the understanding that a Burial is an act that causes distancing and rupture, prompting visualizations of alternative realities. The work explores the potencial of these Burials to produce specific-moments that transform an act and its meaning, image production and authorship, allowing the artist to reclaim a work based on meanings assigned to it by others, while acting both as a participant and as author on the same piece at different times throughout its process.
20
Nguyen, Thai B. (Thai Ba) Carleton University Dissertation Computer Science. "Moment-preserving piecewise linear approximations of signals and images." Ottawa, 1994.
21
Bennett, Leslie L. "Associations between linguapalatal contact patterns and spectral moments for /s/ /." Diss., CLICK HERE for online access, 2009. http://contentdm.lib.byu.edu/ETD/image/etd2793.pdf.
22
Ebner, Bonnie M. "Many telling moments the essence of fragmented image culture /." Orlando, Fla. : University of Central Florida, 2008. http://purl.fcla.edu/fcla/etd/CFE0002116.
23
Hanson, Adam. "Character recognition of optically blurred textual images using moment invariants /." Online version of thesis, 1993. http://hdl.handle.net/1850/11748.
24
Fawcett, Elizabeth Brinton. "Helping with the Transition to Parenthood: An Evaluation of the Marriage Moments Program." Diss., CLICK HERE for online access, 2004. http://contentdm.lib.byu.edu/ETD/image/etd412.pdf.
25
Sampson, Aared D. "Differences in Joint Moments at the Hip, Knee, and Ankle While Wearing Running Shoes and Distance Spikes." Diss., CLICK HERE for online access, 2009. http://contentdm.lib.byu.edu/ETD/image/etd3077.pdf.
26
Gilliland, Tamara. "Marriage moments : a new approach to strengthening couples' relationships through the transition to parenthood /." Diss., CLICK HERE for online access, 2002. http://contentdm.lib.byu.edu/ETD/image/etd149.pdf.
27
Cheng, Ho-Yin. "Lifting schemes for wavelet filters of trigonometric vanishing moments." Click to view the E-thesis via HKUTO, 2002. http://sunzi.lib.hku.hk/hkuto/record/B42577044.
28
Ginos, Brenda Faith. "Parameter Estimation for the Lognormal Distribution." Diss., CLICK HERE for online access, 2009. http://contentdm.lib.byu.edu/ETD/image/etd3205.pdf.
29
Owen, Claire Elayne Bangerter. "Parameter Estimation for the Beta Distribution." Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2670.pdf.
30
Gonzalez, Marjorie Emily. "Spatial analysis of positron emission tomography images of Parkinson's disease using 3D moment invariants." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/43137.
Анотація:
Positron emission tomography (PET) produces images of functional processes of the body in-vivo. The analysis of PET data for research purposes traditionally involves kinetic modeling of the concentration of the radiotracer over time within a region of interest (ROI) in the body to derive parameters related to the uptake/binding of the radiotracer in that region. PET imaging is commonly used to study Parkinson's disease (PD), where loss of motor function is caused by the progressive death of neurons in the brain that produce the neurotransmitter dopamine. In PD, both the kinetic and the spatial distribution of the tracer change due to the disease: the posterior parts of the striatum (in particular in the putamen) are affected before the anterior parts. The purpose of this dissertation is to develop a novel analysis method for PET data that uses the spatial characteristics of the radiotracer's distribution within anatomically-defined ROIs to extract additional information about pathological states. The proposed analysis method is based on mathematical 3D shape descriptors that are invariant to translation, scaling, and rotation, called 3D moment invariants (3DMIs). The variable of interest in this case is not only the radiotracer's uptake rate constant or binding potential, but also the 3D spatial shape and distribution of the radioactivity within the ROI. This dissertation shows that 3DMIs were able to successfully quantify differences in the spatial distribution of PET radiotracer images between healthy controls and PD subjects. 3DMI values were found to correlate with a clinical measure of disease severity in all anatomical regions studied here (putamen, caudate and ventral striatum), as opposed to kinetic parameters which only showed significant correlation to clinically-assessed PD severity in the putamen. Levodopa-induced changes in spatial patterns of dopamine release (as measured using 3DMIs) were found to be significantly correlated with PD severity in all ROIs studied here. These findings suggest that quantitative studies of a radiotracer's spatial distribution can be complementary to kinetic modeling in extracting information about pathological states from PET data and have the potential to contribute novel information in PET neuroimaging studies.
31
Mebarki, Rafik. "Automatic guidance of robotized 2D ultrasound probes with visual servoing based on image moments." Phd thesis, Université Européenne de Bretagne, 2010. http://tel.archives-ouvertes.fr/tel-00476718.
Анотація:
This dissertation presents a new 2D ultrasound-based visual servoing method. The main goal is to automatically guide a robotized 2D ultrasound probe held by a medical robot in order to reach a desired cross-section ultrasound image of an object of interest. This method allows to control both the in-plane and out-of-plane motions of a 2D ultrasound probe. It makes direct use of the 2D ultrasound image in the visual servo scheme, where the feed-back visual features are combinations of image moments. To build the servo scheme, we develop the analytical form of the interaction matrix that relates the image moments time variation to the probe velocity. That modeling is theoretically verified on simple shapes like spherical and cylindrical objects. In order to be able to automatically position the 2D ultrasound probe with respect to an observed object, we propose six relevant independent visual features to control the 6 degrees of freedom of the robotic system. Then, the system is endowed with the capability of automatically interacting with objects without any prior information about their shape, 3D parameters, nor 3D location. To do so, we develop on-line estimation methods that identify the parameters involved in the built visual servo scheme. We conducted both simulation and experimental trials respectively on simulated volumetric objects, and on both objects and soft tissues immersed in a water-filled tank. Successful results have been obtained, which show the validity of the developed methods and their robustness to different errors and perturbations especially those inherent to the ultrasound modality. Keywords: Medical robotics, visual servoing, 2D ultrasound imaging, kinematics modeling, model-free servoing.
32
Elkington, Trevor G. "Moments in space, spaces in time : phenomenology and the embodied depth of cinematic image /." Thesis, Connect to this title online; UW restricted, 2001. http://hdl.handle.net/1773/6621.
33
Umasuthan, M. "Recognition and position estimation of 3D objects from range images using algebraic and moment invariants." Thesis, Heriot-Watt University, 1995. http://hdl.handle.net/10399/763.
34
Dean, Karie Lindsay. "The Effect of a Pseudopalate on Voiceless Obstruent Production: A Spectral Evaluation of Adaptation." Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2490.pdf.
35
Lovejoy, Kimberly Ann Rose. "Marriage moments : an evaluation of an approach to stregnthen couples' relationships during the transition to parenthood, in the context of a home visitation program /." Diss., CLICK HERE for online access, 2004. http://contentdm.lib.byu.edu/ETD/image/etd533.pdf.
36
David, Regis Agenor. "A Generalized Two-Dimensional Model to Reconstruct the Impact Phase in Automobile Collisions." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd2112.pdf.
37
Yanni, Mamdouh. "The influence of thresholding and spatial resolution variations on the performance of the complex moments descriptor feature extractor." Thesis, University of Kent, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262371.
38
Benseddik, Housseme-Eddine. "Estimation de la rotation 3D : approches denses et génériques basées images sphériques." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLE045.
Анотація:
Cette thèse traite du problème de la localisation et de l’estimation du mouvement de rotation dans le contexte de l’analyse d’images sphériques. Plus précisément, le but de ce manuscrit est le développement d’algorithmes génériques d’estimation de la rotation 3D entre les images issues de caméras monoculaires conventionnelles et non-conventionnelles (catadioptrique, fisheye, ... ). Les contributions principales de la thèse reposent sur l’exploitation de la riche information d’intensité lumineuse dans l’image, notamment omnidirectionnelle, pour accomplir l’estimation des rotations 3D, y compris les larges. Une première contribution de la thèse est la proposition d’une nouvelle représentation de l’intensité lumineuse de l’image sous forme d’un objet 3D de topologie sphérique. Le calcul de coefficients de la transformée en harmoniques sphériques directement à partir du maillage de l’objet, est accompagné de la décomposition SVD, permettant d’estimer la rotation qui lie les deux images. La deuxième contribution de la thèse est une solution analytique d’estimation de la rotation reposant sur une stratégie dense et indirecte de capture de l’intensité lumineuse de l’image, par le biais de moments photométriques sphériques. Le formalisme théorique établi vise à définir une modélisation analytique de la matrice d’interaction relative aux moments photométriques. En utilisant les propriétés de cette solution, nous proposons trois approches de l’estimation de la rotation 3Dentre deux images sphériques. L’étude de performances menée montrent que nos approches permettant d’estimer efficacement la rotation 3Dde l’image sphérique. Pour finir, plusieurs scénarios d’expérimentations sont proposés et effectués. Ces derniers incluent les environnements intérieurs et extérieursThis thesis deals with the problem of location and motion estimation in the context of spherical image analysis. More specifically, the purpose of this manuscript is the development of generic algorithms for estimating 3D rotation between images captured by conventional and non-conventional (catadioptric, fisheye, ...) monocular camera. The main contributions of the thesis are based on the exploitation of the rich intensity information available in the image, notably omnidirectional, to accomplish the estimation of the 3D rotation, including the large ones. A first contribution is to propose a new representation for image intensity as a 3D object of spherical topology. The coefficients of the spherical harmonics transform computation, directly from the object mesh, is accompanied by the SVD decomposition, allowing to estimate the rotation which links the two images. The second contribution of the thesis is a closed form solution for estimating the rotation based on a dense and indirect strategy of perceiving the image intensity, which may be achieved by spherical photometric moments. The established theoretical formalism opts to define an analytical modeling of the interaction matrix relative to the photometric moments. Using the properties of this solution, we propose three approaches to estimate the 3D rotation between two spherical images. The conducted performance study show that our approaches allow to efficiently determine 3D rotation of the spherical image. Finally, several experimental scenarios are proposed and evaluated. This included the indoor and outdoor environments
39
Yeremou, Tamtsia Aurélien. "Nouvelles contributions à l'application des moments en asservissement visuel." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2013. http://tel.archives-ouvertes.fr/tel-01017080.
Анотація:
Cette thèse propose des contributions très prometteuses au sujet du choix des primitives visuelles en asservissement visuel utilisant les moments 2D extraits de l'image. Nous avons proposé une nouvelle manière de résoudre un problème important en asservissement visuel, à savoir la commande du mouvement de rotation suivant les axes orthogonaux à l'axe optique. Ce travail représente une amélioration significative des travaux précédents en asservissement visuel basé sur l'utilisation des moments 2D extraits de l'image pour commander les degrés de liberté des robots manipulateurs. La commande la plus utilisée est connue sous le nom de commande cinématique. L'approche emploie un descripteur global d'image basé sur des moments 2D "shifted" dont les invariants calculés à partir de ces moments 2D "shifted" utilisent des moments d'ordre faible connus pour être robustes au bruit. De plus, ces invariants choisis ne dépendant pas de la forme de l'objet, sont invariants au mouvement de translation, de rotation et d'échelle. Cette nouvelle façon de faire vient ainsi résoudre les problèmes vus dans les travaux précédents relatifs aux choix des combinaisons des moments invariants basés sur les moments centrés et qui dépendent de la forme de l'objet considéré. Dans les travaux précédents, ces invariants sont calculés avec des moments dont l'ordre est compris entre trois et cinq qui sont vulnérables aux bruits de mesure. D'un point de vue asservissement visuel, le travail est basé sur la détermination explicite de la matrice d'interaction calculée à partir des moments 2D "shifted" dont le choix des paramètres de décalages respectent les propriétés d'invariances aux mouvements de translation, de rotation et d'échelle. En procédant ainsi, les informations visuelles choisies montrent la capacité de représenter les objets de formes symétriques et non symétriques. Des résultats de simulations sont présentés pour illustrer la validité de notre proposition.
40
Le, Caillec Jean-Marc. "Etude et traitement des images sar grace aux moments et spectres d'ordres superieurs." Rennes 1, 1997. http://www.theses.fr/1997REN10142.
Анотація:
La phase des composantes de fourier d'un signal constitue une partie importante de l'information du signal et qui est primordiale pour certains signaux, par exemple les signaux provenant d'une chaine de transmission non lineaire. Le spectre d'un signal n'etant pas sensible a l'information de phase, afin de retrouver cette information il est necessaire d'utiliser les moments et spectres d'ordres superieurs qui sont des quantites complexes. La detection, localisation et quantification des non linearites (par l'intermediaire desi couplages de phases) peuvent etre effectuees grace au bispectre et a sa version normalisee la bicoherence. Un modele naturel d'interpretation des resultats bispectraux est le modele de volterra d'ordre 2 qui comporte une composante lineaire et une composante quadratique. Les couplages primaires ont lieu entre trois ondes du spectre originel (qui se retrouve dans le spectre du signal de sortie par l'intermediaire du noyau lineaire) avec leur interaction quadratique (mais un autre type de couplage existe dans ce modele). Une application interessante est la detection localisation et quantification des non linearites dans le processus sar d'imagerie de la mer. Une partie des travaux presentee dans cette these a consiste a modeliser le processus sar sur des modeles de volterra d'ordre 2 et ainsi obtenir dans un premier temps une quantification des non linearites du processus sar, puis a comprendre les mecanismes de detection/non detection des non linearites lies a ce processus. Enfin deux methodes d'inversion non lineaires sont aussi proposees afin de retrouver le spectre du signal en entree d'une chaine de transmission non lineaire. L'une consiste en l'identification d'un modele de volterra d'ordre 2 inverse dans le domaine spatial et l'autre par une suppression des interactions quadratiques dans le domaine frequentiel.
41
Hruška, Martin. "Detekce charakteristických bodů obličeje v telerentgenovén snímku." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-218905.
Анотація:
Description cephalometric images and the characteristic points on the skull for cephalometric analysis. Theoretical analysis of digital image editing and image before the actual detection. The range of possible methods for determining the characteristic points on the face. Experimental verification of edge detectors, Hu moments with neural networks and Haar wavelets with Viola-Jones detector.
42
Weaver, Andrea Lynn. "The Effect of a Lingual Magnet on Fricative Production: An Acoustic Evaluation of Placement and Adaptation." Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd1009.pdf.
43
Hattaway, James T. "Parameter Estimation and Hypothesis Testing for the Truncated Normal Distribution with Applications to Introductory Statistics Grades." Diss., CLICK HERE for online access, 2010. http://contentdm.lib.byu.edu/ETD/image/etd3412.pdf.
44
Bilson, Matthew James. "Momentum and scalar transport in the straight pipe and rotating cylinder : a comparison of transport mechanisms /." St. Lucia, Qld, 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17836.pdf.
45
Sina, Md Ibne. "Satellite Image Processing with Biologically-inspired Computational Methods and Visual Attention." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23122.
Анотація:
The human vision system is generally recognized as being superior to all known artificial vision systems. Visual attention, among many processes that are related to human vision, is responsible for identifying relevant regions in a scene for further processing. In most cases, analyzing an entire scene is unnecessary and inevitably time consuming. Hence considering visual attention might be advantageous. A subfield of computer vision where this particular functionality is computationally emulated has been shown to retain high potential in solving real world vision problems effectively. In this monograph, elements of visual attention are explored and algorithms are proposed that exploit such elements in order to enhance image understanding capabilities. Satellite images are given special attention due to their practical relevance, inherent complexity in terms of image contents, and their resolution. Processing such large-size images using visual attention can be very helpful since one can first identify relevant regions and deploy further detailed analysis in those regions only. Bottom-up features, which are directly derived from the scene contents, are at the core of visual attention and help identify salient image regions. In the literature, the use of intensity, orientation and color as dominant features to compute bottom-up attention is ubiquitous. The effects of incorporating an entropy feature on top of the above mentioned ones are also studied. This investigation demonstrates that such integration makes visual attention more sensitive to fine details and hence retains the potential to be exploited in a suitable context. One interesting application of bottom-up attention, which is also examined in this work, is that of image segmentation. Since low salient regions generally correspond to homogenously textured regions in the input image; a model can therefore be learned from a homogenous region and used to group similar textures existing in other image regions. Experimentation demonstrates that the proposed method produces realistic segmentation on satellite images. Top-down attention, on the other hand, is influenced by the observer’s current states such as knowledge, goal, and expectation. It can be exploited to locate target objects depending on various features, and increases search or recognition efficiency by concentrating on the relevant image regions only. This technique is very helpful in processing large images such as satellite images. A novel algorithm for computing top-down attention is proposed which is able to learn and quantify important bottom-up features from a set of training images and enhances such features in a test image in order to localize objects having similar features. An object recognition technique is then deployed that extracts potential target objects from the computed top-down attention map and attempts to recognize them. An object descriptor is formed based on physical appearance and uses both texture and shape information. This combination is shown to be especially useful in the object recognition phase. The proposed texture descriptor is based on Legendre moments computed on local binary patterns, while shape is described using Hu moment invariants. Several tools and techniques such as different types of moments of functions, and combinations of different measures have been applied for the purpose of experimentations. The developed algorithms are generalized, efficient and effective, and have the potential to be deployed for real world problems. A dedicated software testing platform has been designed to facilitate the manipulation of satellite images and support a modular and flexible implementation of computational methods, including various components of visual attention models.
46
Bakthavatchalam, Manikandan. "Utilisation of photometric moments in visual servoing." Thesis, Rennes 1, 2015. http://www.theses.fr/2015REN1S057/document.
Анотація:
Cette thèse s'intéresse à l'asservissement visuel, une technique de commande à retour d'information visuelle permettant de contrôler le mouvement de systèmes équipées de caméras tels que des robots. Pour l'asservissement visuel, il est essentiel de synthétiser les informations obtenues via la caméra et ainsi établir la relation entre l'évolution de ces informations et le déplacement de la caméra dans l'espace. Celles-ci se basent généralement sur l'extraction et le suivi de primitives géométriques comme des points ou des lignes droites dans l'image. Il a été montré que le suivi visuel et les méthodes de traitement d'images restent encore un frein à l'expansion des techniques d'asservissement visuel. C'est pourquoi la distribution de l'intensité lumineuse de l'image a également été utilisée comme caractéristique visuelle. Finalement, les caractéristiques visuelles basée sur les moments de l'image ont permis de définir des lois de commande découplées. Cependant ces lois de commande sont conditionnées par l'obtention d'une région parfaitement segmentée ou d'un ensemble discret de points dans la scène. Ce travail propose donc une stratégie de capture de l'intensité lumineuse de façon indirecte, par le biais des moments calculés sur toute l'image. Ces caractéristiques globales sont dénommées moments photométriques. Les développements théoriques établis dans cette thèse tendent à définir une modélisation analytique de la matrice d'interaction relative aux moments photométriques. Ces derniers permettent de réaliser une tâche d'asservissement visuel dans des scènes complexes sans suivi visuel ni appariement. Un problème pratique rencontré par cette méthode dense d'asservissement visuel est l'apparition et la disparition de portions de l'image durant la réalisation de la tâche. Ce type de problème peut perturber la commande, voire dans le pire des cas conduire à l’échec de la réalisation de la tâche. Afin de résoudre ce problème, une modélisation incluant des poids spatiaux est proposée. Ainsi, la pondération spatiale, disposant d'une structure spécifique, est introduite de telle sorte qu'un modèle analytique de la matrice d'interaction peut être obtenue comme une simple fonction de la nouvelle formulation des moments photométriques. Une partie de ce travail apporte également une contribution au problème de la commande simultanée des mouvements de rotation autour des axes du plan image. Cette approche définit les caractéristiques visuelles de façon à ce que l'asservissement soit optimal en fonction de critères spécifiques. Quelques critères de sélection basées sur la matrice d'interaction ont été proposés. Ce travail ouvre donc sur d'intéressantes perspectives pour la sélection d'informations visuelles pour l'asservissement visuel basé sur les moments de l'imageThis thesis is concerned with visual servoing, a feedback control technique for controlling camera-equipped actuated systems like robots. For visual servoing, it is essential to synthesize visual information from the camera image in the form of visual features and establish the relationship between their variations and the spatial motion of the camera. The earliest visual features are dependent on the extraction and visual tracking of geometric primitives like points and straight lines in the image. It was shown that visual tracking and image processing procedures are a bottleneck to the expansion of visual servoing methods. That is why the image intensity distribution has also been used directly as a visual feature. Finally, visual features based on image moments allowed to design decoupled control laws but they are restricted by the availability of a well-segmented regions or a discrete set of points in the scene. This work proposes the strategy of capturing the image intensities not directly, but in the form of moments computed on the whole image plane. These global features have been termed photometric moments. Theoretical developments are made to derive the analytical model for the interaction matrix of the photometric moments. Photometric moments enable to perform visual servoing on complex scenes without visual tracking or image matching procedures, as long as there is no severe violation of the zero border assumption (ZBA). A practical issue encountered in such dense VS methods is the appearance and disappearance of portions of the scene during the visual servoing. Such unmodelled effects strongly violate the ZBA assumption and can disturb the control and in the worst case, result in complete failure to convergence. To handle this important practical problem, an improved modelling scheme for the moments that allows for inclusion of spatial weights is proposed. Then, spatial weighting functions with a specific structure are exploited such that an analytical model for the interaction matrix can be obtained as simple functions of the newly formulated moments. A part of this work provides an additional contribution towards the problem of simultaneous control of rotational motions around the image axes. The approach is based on connecting the design of the visual feature such that the visual servoing is optimal with respect to specific criteria. Few selection criteria based on the interaction matrix was proposed. This contribution opens interesting possibilities and finds immediate applications in the selection of visual features in image moments-based VS
47
Cruz-Morgado, Luciano E. "IMAGE, EXPRESSION, AND MEANING OF THE MULATO IN FOUR MOMENTS OF CUBAN LITERATURE (1968-1948)." UKnowledge, 2008. http://uknowledge.uky.edu/hisp_etds/13.
Анотація:
My thesis grows out of a reflection on Cuban literature, race, and national identity within the broader framework of the canon and its marginal literature. It explores the dynamics of the Cuban canon and specific visions of race and nation, and studies one play, two novels, a book of poems and a radio script from four different moments in Cuban history.
Fernández Vilarós´s play Los negros catedráticos (1868) sets for the first time the topic of race at the center of the national debate, immediately before the first and longest Cuban independence war.
The play contrasts with Cecilia Valdés (1882), arguably the most canonical Cuban novel, with its subversive remake, Sofía (1891) and analyzes how the former seeks to conceal the nation’s racially-mixed character and present the mulata condition as a mere border-line. Sofía, however, erases this line and expands the mulata condition to everyone. Following this reading, it seeks to identify a set of markers that configures a mulato discourse in Regino Boti´s Arabescos mentales (1913). It proposes that the characteristic tendency toward elitism in Latin American Modernismo is actually a racial device to accomplish racial equality. And so language (and poetry) emerges in Boti as the most efficient vehicle to resolve racial deficiency.
Finally, the thesis studies the script of the most successful Latino American soap opera ever, El derecho de nacer (1948), by Félix B. Caignet. Here Caignet converges the Villaverde´s idea of race as an objective value with Boti’s White idealization. He also proposes symbolic or cultural whitening as the only vehicle of social improvement.
In conclusion, the common denominator of all four works is the representation of mulatez as an absolute and objective fact, as opposed to the marginal Sofía, which presents it as relative and subjective. Therefore, despite the traditional national discourse of Cuba as a racially-mixed country, the canon has banned those works that actually support this postulate.
48
Dvořák, Pavel. "Popis objektů v obraze." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-218957.
Анотація:
This thesis consider description of segments identified in image. At first there are described main methods of segmentation because it is a process contiguous before describing of objects. Next chapter is devoted to methods which focus on description identified regions. There are studied algorithms used for characterizing of different features. There are parts devoted to color, location, size, orientation, shape and topology. The end of this chapter is devoted to moments. Next chapters are focused on designing fit algorithms for segments description and XML files creating according to MPEG-7 standards and their implementation into RapidMiner. In the last chapter there are described results of the implementation.
49
Di, Nunno Palma. "Réfléchir Bergson. Moments de retournements, d’inversion et de conversion dans l’œuvre bergsonienne." Thesis, Paris 4, 2012. http://www.theses.fr/2012PA040186.
Анотація:
Les termes « retournement », « renversement », « inversion », « conversion » etc. appartiennent à un lexique récurant dans les textes de Bergson. La présence fréquente de ces mots sous sa plume, et des adjectifs et des verbes associés, annonce notre point de départ. De ce lexique nous prenons l’élan pour dévoiler une lecture de Bergson à travers un filtre qu’il faut, avant tout, bien calibré. C’est ainsi qu’une image surgit ; image qu’il faut prendre, au premier abord, dans un sens tout à fait vague, et que nous considérons comme «image médiatrice»; image, ensuite, qui se clarifie comme «centrale» ou «primitive» à partir de laquelle d’autres images rayonnent. À la recherche du style de la pensée, à travers des moments de l’écriture plus que des thèmes, nous parcourrons les œuvres majeures de Bergson pour mettre en lumière des moments de modification, soit proposés par l’auteur dans sa doctrine, soit envisageables dans la pratique de la pensée, dans son exercice, ou, autrement dit, dans l’application de la méthode. Une difficulté majeure s’impose pour demeurer irrésolue, mais plein d’une tension féconde : le paradoxe d’exprimer l’inexprimable se mêle avec celui d’explorer le bergsonisme à partir de sa langue d’expression. Ce parcours, semé d'impasses, nous conduira à l’identification de deux moments principaux: un moment de retournement subjectif-épistémologique et un moment ontologique-métaphysique. Le premier concerne le sujet et sa dimension existentielle (voir sa conduite) en tension avec la méthode philosophique en tant que inversion de la destination spontanément pratique de l’intelligence. Le deuxième touche directement la doctrine et, notamment, la théorie de la perception dans Matière et mémoire ainsi que la genèse de la matérialité et de l’intellectualité dans L’évolution créatrice. C’est dans l’œuvre de 1907 et dans ses possibles prolongements (que nous laissons entrevoir), qu’on trouve aussi la correspondance et la complication des deux moments. Avec eux nous atteignons l’image conclusive d’un accord reversable à travers lequel faire résonner la philosophie de BergsonSuch terms as « retournement », « renversement », « inversion », « conversion » etc. belong to a recurrent lexicon in Bergson’s works. The frequent presence in his writings of these words, and related adjectives and verbs, announces our departing point. Its from this lexicon that we move to unveil our reading of Bergson through a filter which, first of all, must be well calibrated. Thus, an image arises, one that we must take, at first, with a certain vagueness, considering it « image médiatrice »; an image which then clarifies itself as «centrale» or «primitive», from which other images radiate. Looking for the style of thought, through moments of writings more then themes, we cover Bergson’s major works to uncover moments of change, whether proposed by the philosopher in his doctrine, or traceable in the practice of thought, its exercise, or, in other words, the application of the method. A major difficulty comes forth, unsolved, but full of fruitful tension: the paradox of expressing the inexpressible entwines itself with that of exploring bergsonism with its language of expression as a starting point. This path, dotted with impasses, will take us to the identification of two principal moments: a moment of subjective-epistemological reversal and an ontological-metaphysical one. The first one applies to the subject and its existential dimension (read behavior) in strained relationship with the philosophical method as inversion of the spontaneously practical destination of intelligence. The second one touches directly the doctrine and, in particular, the theory of perception in Matière et mémoire as well as the genesis of materiality and intellectuality in L’évolution créatrice. It’s in the 1907 work and its possible extensions (which we only glance at), that we also find the correspondence and complication of the two moments. With these we achieve the final image of an invertible chord through which Bergson’s philosophy resounds
50
Hoang, Thai V. "Image Representations for Pattern Recognition." Phd thesis, Université Nancy II, 2011. http://tel.archives-ouvertes.fr/tel-00714651.
Анотація:
La pertinence d'une application de traitement de signal relève notamment du choix d'une "représentation adéquate''. Par exemple, pour la reconnaissance de formes, la représentation doit mettre en évidence les propriétés salientes d'un signal; en débruitage, permettre de séparer le signal du bruit; ou encore en compression, de synthétiser fidèlement le signal d'entrée à l'aide d'un nombre réduit de coefficients. Bien que les finalités de ces quelques traitements soient distinctes, il apparait clairement que le choix de la représentation impacte sur les performances obtenues. La représentation d'un signal implique la conception d'un ensemble génératif de signaux élémentaires, aussi appelé dictionnaire ou atomes, utilisé pour décomposer ce signal. Pendant de nombreuses années, la conception de dictionnaire a suscité un vif intérêt des chercheurs dans des domaines applicatifs variés: la transformée de Fourier a été employée pour résoudre l'équation de la chaleur; celle de Radon pour les problèmes de reconstruction; la transformée en ondelette a été introduite pour des signaux monodimensionnels présentant un nombre fini de discontinuités; la transformée en contourlet a été conçue pour représenter efficacement les signaux bidimensionnels composées de régions d'intensité homogène, à frontières lisses, etc. Jusqu'à présent, les dictionnaires existants peuvent être regroupés en deux familles d'approches: celles s'appuyant sur des modèles mathématiques de données et celles concernant l'ensemble de réalisations des données. Les dictionnaires de la première famille sont caractérisés par une formulation analytique. Les coefficients obtenus dans de telles représentations d'un signal correspondent à une transformée du signal, qui peuvent parfois être implémentée rapidement. Les dictionnaires de la seconde famille, qui sont fréquemment des dictionnaires surcomplets, offrent une grande flexibilité et permettent d'être adaptés aux traitements de données spécifiques. Ils sont le fruit de travaux plus récents pour lesquels les dictionnaires sont générés à partir des données en vue de la représentation de ces dernières. L'existence d'une multitude de dictionnaires conduit naturellement au problème de la sélection du meilleur d'entre eux pour la représentation de signaux dans un cadre applicatif donné. Ce choix doit être effectué en vertu des spécificités bénéfiques validées par les applications envisagées. En d'autres termes, c'est l'usage qui conduit à privilégier un dictionnaire. Dans ce manuscrit, trois types de dictionnaire, correspondant à autant de types de transformées/représentations, sont étudiés en vue de leur utilisation en analyse d'images et en reconnaissance de formes. Ces dictionnaires sont la transformée de Radon, les moments basés sur le disque unitaire et les représentations parcimonieuses. Les deux premiers dictionnaires sont employés pour la reconnaissance de formes invariantes tandis que la représentation parcimonieuse l'est pour des problèmes de débruitage, de séparation des sources d'information et de classification. Cette thèse présentent des contributions théoriques validées par de nombreux résultats expérimentaux. Concernant la transformée de Radon, des pistes sont proposées afin d'obtenir des descripteurs de formes invariants, et conduisent à définir deux descripteurs invariants aux rotations, l'échelle et la translation. Concernant les moments basés sur le disque unitaire, nous formalisons les stratégies conduisant à l'obtention de moments orthogonaux. C'est ainsi que quatre moments harmoniques polaires génériques et des stratégies pour leurs calculs rapides sont introduits. Enfin, concernant les représentations parcimonieuses, nous proposons et validons un formalisme de représentation permettant de combiner les trois critères suivant : la parcimonie, l'erreur de reconstruction ainsi que le pouvoir discriminant en classification.