Relevant bibliographies by topics / Invariant moments / Dissertations / Theses
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Dissertations / Theses on the topic 'Invariant moments'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 July 2025

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1

Al-Dulaimi, Khamael Abbas Khudhair. "White blood cells classification using higher order spectra and l-moments invariant features." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/208261/1/Khamael%20Abbas%20Khudhair_Al-Dulaimi_Thesis.pdf.

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This project was a step forward in development of methods to investigate white blood cells and their types. The thesis investigated segmentation and classification methods for white blood cells and their nuclei from other components, such red blood cells, platelets and background, using signal processing, image processing and machine learning techniques, in order to generate automated reports. The outcome of the project was to enhance the accuracy of pathologists’ decisions and their efficiency, and overall benefit patients for faster and more accurate diagnosis of diseases under varying labor
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Hamachi, Kentaro. "Quantum Moment Maps and Invariants for G-invariant Star Products." 京都大学 (Kyoto University), 2000. http://hdl.handle.net/2433/151649.

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Bujack, Roxana. "Orientation Invariant Pattern Detection in Vector Fields with Clifford Algebra and Moment Invariants." Doctoral thesis, Universitätsbibliothek Leipzig, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-158268.

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The goal of this thesis is the development of a fast and robust algorithm that is able to detect patterns in flow fields independent from their orientation and adequately visualize the results for a human user. This thesis is an interdisciplinary work in the field of vector field visualization and the field of pattern recognition. A vector field can be best imagined as an area or a volume containing a lot of arrows. The direction of the arrow describes the direction of a flow or force at the point where it starts and the length its velocity or strength. This builds a bridge to vector field v
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Bujack, Roxana. "Orientation Invariant Pattern Detection in Vector Fields with Clifford Algebra and Moment Invariants." Master's thesis, Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-191202.

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The goal of this thesis is the development of a fast and robust algorithm that is able to detect patterns in flow fields independent from their orientation and adequately visualize the results for a human user. This thesis is an interdisciplinary work in the field of vector field visualization and the field of pattern recognition. A vector field can be best imagined as an area or a volume containing a lot of arrows. The direction of the arrow describes the direction of a flow or force at the point where it starts and the length its velocity or strength. This builds a bridge to vector field vi
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Miyamoto, Bruno Seiji. "Método de processamento digital de imagens para inferência da qualidade de materiais preparados com fibras vegetais." Universidade Federal de São Carlos, 2013. https://repositorio.ufscar.br/handle/ufscar/538.

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Made available in DSpace on 2016-06-02T19:06:07Z (GMT). No. of bitstreams: 1 5414.pdf: 4869959 bytes, checksum: f5d64a08bee81d350c64d71299ae404a (MD5) Previous issue date: 2013-08-02<br>Financiadora de Estudos e Projetos<br>This Dissertation presents a method development based on image processing techniques, which enables the verification and quality analysis of organic fibers mixture in thermoplastic starch (TPS). In order to do this analysis, we implemented a Python programming language module, which is able to compute invariant moments of Hu and other statistical calculations to quantify
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Jorge, Guilherme Henrique Renó. "Arquitetura para extração de características invariantes em imagens binárias utilizando dispositivos de lógica programável complexa." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/18/18133/tde-06022007-141241/.

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Os projetistas de sistemas digitais enfrentam sempre o desafio de encontrar o balanço correto entre velocidade e generalidade de processamento de seu hardware. Originalmente dispositivos de lógica programável de alta densidade como FPGAs (Field Programable Gate Arrays) e CPLDs (Complex Logic Programmable Devices) vinham sendo utilizados como dispositivos de lógica acoplada(glue logic), reduzindo significantemente o número de componentes em um sistema. Seu uso como forma de substituir arquiteturas já existentes de microcontroladores e microprocessadores já é uma realidade. A representação e rec
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Rauch, Johannes. "Discretisation-invariant swaps and higher-moment risk premia." Thesis, University of Sussex, 2016. http://sro.sussex.ac.uk/id/eprint/61473/.

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This thesis introduces a general framework for model-free discretisation-invariant swaps. In the first main chapter a novel design for swap contracts is developed where the realised leg is modified such that the fair value is independent of the monitoring partition. An exact swap rate can then be derived from the price aportfolio of vanilla out-of-the-money options without any discrete-monitoring or jump errors. In the second main chapter the P&Ls on discretisation-invariant swaps associated with the variance, skewness and kurtosis of the log return distribution are used as estimators for the
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8

Nguyen, Lily T. "Quantification of Microstructural Evolution Using Moment Invariants." Research Showcase @ CMU, 2015. http://repository.cmu.edu/dissertations/604.

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9

Ng, Bernard. "Novel region based fMRI analysis using invariant moment descriptors." Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/31787.

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A new functional magnetic resonance imaging (fMRI) analysis approach based on invariant spatial descriptors was developed for quantitative characterization of brain activation patterns within a region of interest (ROI). In particular, the feasibility of using three dimensional moment invariants (3DMIs) to perform such spatial characterization was examined. The use of spatial descriptors is particularly novel in the field of ROI-based fMRI analysis, since up till now, only magnitude-based features were traditionally employed, which neglect the information encoded by voxel locations within an RO
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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.

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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 p
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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.

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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 capt
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Hanson, Adam. "Character recognition of optically blurred textual images using moment invariants /." Online version of thesis, 1993. http://hdl.handle.net/1850/11748.

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Silva, Rodrigo Dalvit Carvalho da. "Um estudo sobre a extraÃÃo de caracterÃsticas e a classificaÃÃo de imagens invariantes à rotaÃÃo extraÃdas de um sensor industrial 3D." Universidade Federal do CearÃ, 2014. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=12154.

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CoordenaÃÃo de AperfeÃoamento de Pessoal de NÃvel Superior<br>Neste trabalho, à discutido o problema de reconhecimento de objetos utilizando imagens extraÃdas de um sensor industrial 3D. NÃs nos concentramos em 9 extratores de caracterÃsticas, dos quais 7 sÃo baseados nos momentos invariantes (Hu, Zernike, Legendre, Fourier-Mellin, Tchebichef, Bessel-Fourier e Gaussian-Hermite), um outro à baseado na Transformada de Hough e o Ãltimo na anÃlise de componentes independentes, e, 4 classificadores, Naive Bayes, k-Vizinhos mais PrÃximos, MÃquina de Vetor de Suporte e Rede Neural Artificial-Perceptr
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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.

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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.
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Langbein, Max [Verfasser], and Hans [Akademischer Betreuer] Hagen. "Higher Order Moment Invariants and their Applications / Max Langbein. Betreuer: Hans Hagen." Kaiserslautern : Technische Universität Kaiserslautern, 2014. http://d-nb.info/1056907215/34.

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16

Zakaria, Marwan F. "An automated vision system using a fast 2-dimensional moment invariants algorithm /." Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66244.

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Kalima, Valence. "Use of magnetic moment invariance in low energy electron spectrometry." Thesis, McGill University, 1988. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61831.

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18

Carbone, Gaspare. "Invariants of N-Dimensional PL-Manifolds from the (Re)Coupling of Angular Momenta." Doctoral thesis, SISSA, 2000. http://hdl.handle.net/20.500.11767/4229.

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Costa, Leonardo Alves da. "Identificação automática de caracteres em antibiogramas com uso de momentos invariantes." reponame:Repositório Institucional da UnB, 2015. http://dx.doi.org/10.26512/2015.07.D.19883.

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Dissertação (mestrado)—Universidade de Brasília, Faculdade UnB Gama, Programa de Pós-Graduação em Engenharia Biomédica, 2015.<br>O antibiograma por disco-difusão é um procedimento laboratorial utilizado para determinar a suscetibilidade de micro-organismos em relação a um antibiótico. Neste exame, os antibióticos são impregnados em discos que são rotulados com caracteres alfanuméricos. A identificação automática destes rótulos é de crucial importância na automação deste antibiograma, visto que descrevem o antimicrobiano e sua respectiva concentração. Sendo assim, este trabalho apresenta uma t
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Roccia, Stéphanie. "La co-magnétométrie mercure pour la mesure du moment électrique dipolaire du neutron : optimisation et application au test de l'invariance de Lorentz." Grenoble 1, 2009. https://theses.hal.science/tel-00440287.

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Cette thèse traite de la magnétométrie dans le cadre de la mesure du moment électrique dipolaire du neutron avec le spectromètre RAL/Sussex/ILL. En particulier, le co-magnétomètre mercure, pré-existant, a été modélisé et optimisé en vue de son utilisation pour les prochaines mesures au Paul Scherrer Institut (Villigen, Suisse) en 2010-2012. Sur la base de données prises à l'Institut Laue-Langevin (Grenoble, France), la complémentarité entre la magnétométrie externe césium et la co-magnétométrie mercure a été étudiée. Un tel système de double magnétométrie est unique. Cette étude débouche sur u
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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.

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Harrison, Ryan K. S. "Investigating the Relationships Between Material Properties and Microstructural Shapes as Quantified by Moment Invariants." Research Showcase @ CMU, 2018. http://repository.cmu.edu/dissertations/1162.

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The analysis of microstructural shapes is an underutilized tool in the field of materials science. Typical observations of morphology are qualitative, rather than quantitative, which prevents the identification of relationships between shape and the mechanical properties of a material. Recent advances in the fields of computer vision and high-dimensional analysis have made computer-based shape characterization feasible on a variety of materials. In this work, the relationship between microstructural shapes, and the properties and function of the material as a whole, is explored using moment in
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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.

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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
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Maceček, Aleš. "Umělá neuronová síť RCE." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220065.

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This paper is focused on an artificial neural network RCE, especially describing the topology, properties and learning algorithm of the network. This paper describes program uTeachRCE developed for learning the RCE network and program RCEin3D, which is created to visualize the RCE network in 3D space. The RCE network is compared with a multilayer neural network with a learning algorithm backpropagation in the practical application of recognition letters. For a descriptions of the letters were chosen moments invariant to rotation, translation and scaling image.
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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.

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Poinot, Thierry. "Contribution à l'identification des systèmes : - par une méthode de surparamétrisation - en traitement des eaux." Poitiers, 1996. http://www.theses.fr/1996POIT2252.

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Ce memoire de these est presente en deux parties distinctes ayant pour theme commun l'identification. La premiere partie traite de l'identification des systemes discrets par surparametrisation. Trois algorithmes d'identification sont proposes et une etude theorique de la convergence est realisee par l'intermediaire des moments discrets. La troisieme technique proposee est basee sur l'estimateur des moindres carres etendus. Elle realise un bon compromis entre la precision de l'estimation et la charge de calcul induite par la surparametrisation. Par la suite, on s'interesse a la reduction d'un m
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Grahl, Paulo Gustavo de Sampaio. "Essays on Spatial Econometrics." reponame:Repositório Institucional do FGV, 2012. http://hdl.handle.net/10438/11268.

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Submitted by Paulo Gustavo Grahl (pgrahl@fgvmail.br) on 2013-10-18T05:32:44Z No. of bitstreams: 1 DoutoradoPG_final.pdf: 23501670 bytes, checksum: 55b15051b9acc69ac74e639efe776fae (MD5)<br>Approved for entry into archive by ÁUREA CORRÊA DA FONSECA CORRÊA DA FONSECA (aurea.fonseca@fgv.br) on 2013-10-28T18:22:53Z (GMT) No. of bitstreams: 1 DoutoradoPG_final.pdf: 23501670 bytes, checksum: 55b15051b9acc69ac74e639efe776fae (MD5)<br>Approved for entry into archive by Marcia Bacha (marcia.bacha@fgv.br) on 2013-10-29T18:24:15Z (GMT) No. of bitstreams: 1 DoutoradoPG_final.pdf: 23501670 bytes, check
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Ribeiro, Hebert Luchetti. "Reconhecimento de gestos usando segmentação de imagens dinâmicas de mãos baseada no modelo de mistura de gaussianas e cor de pele." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/18/18133/tde-27112006-132158/.

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O objetivo deste trabalho é criar uma metodologia capaz de reconhecer gestos de mãos, a partir de imagens dinâmicas, para interagir com sistemas. Após a captação da imagem, a segmentação ocorre nos pixels pertencentes às mãos que são separados do fundo pela segmentação pela subtração do fundo e filtragem de cor de pele. O algoritmo de reconhecimento é baseado somente em contornos, possibilitando velocidade para se trabalhar em tempo real. A maior área da imagem segmentada é considerada como região da mão. As regiões detectadas são analisadas para determinar a posição e a orientação da mão. A p
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Usai, Alessandro. "Spontaneous CP violation in the next-to-minimal supersymmetric standard model." Thesis, University of Glasgow, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323421.

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Van, Staden Paul Jacobus. "Modeling of generalized families of probability distribution in the quantile statistical universe." Thesis, University of Pretoria, 2013. http://hdl.handle.net/2263/40265.

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This thesis develops a methodology for the construction of generalized families of probability distributions in the quantile statistical universe, that is, distributions specified in terms of their quantile functions. The main benefit of the proposed methodology is that it generates quantile-based distributions with skewness-invariant measures of kurtosis. The skewness and kurtosis can therefore be identified and analyzed separately. The key contribution of this thesis is the development of a new type of the generalized lambda distribution (GLD), using the quantile function of the genera
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Roiban, Radu S. "Le moment anapolaire d'un fermion de spin 1/2 dans le modèle standard et invariance de jauge." Thèse, Université du Québec à Trois-Rivières, 1997. http://depot-e.uqtr.ca/4937/1/000631293.pdf.

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Neves, Evelina Maria de Almeida. "Estratégia atencional para busca visual e reconhecimento invariante de objetos baseada na integração de características bottom-up e top-down." Universidade de São Paulo, 2000. http://www.teses.usp.br/teses/disponiveis/76/76132/tde-14032014-103419/.

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Uma das tarefas básicas dos mecanismos atencionais é decidir qual a localização dentro do campo visual, em que devemos prestar atenção primeiro. Um objeto que contenha características distintas, tais como orientação, forma, cor, tamanho, brilho, textura, etc. diferentes, pode atrair a atenção de uma maneira \"bottom-up\". A informação \"top-down\" baseia-se no conhecimento prévio e tem uma grande influência nas localizações atendidas. Inspirado nos mecanismos da Atenção Visual Humana, embora sem a pretensão de simulá-la, este trabalho prevê o desenvolvimento de uma nova metodologia que integra
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Wendt, Herwig. "Contributions of Wavelet Leaders and Bootstrap to Multifractal Analysis : Images, estimation performance, dependence structure and vanishing moments. Confidence Intervals and Hypothesis Tests." Lyon, École normale supérieure (sciences), 2008. http://www.theses.fr/2008ENSL0474.

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Cette thèse étudie l'apport à l'analyse multifractale de l'utilisation des coefficients d'ondelettes dominants et des techniques statistiques bootstrap. Les propriétés statistiques de procédures d'analyse multifractale construites à partir de coefficients dominants sont caractérisées. L'extension aux images est validée. Plusieurs difficultés théoriques, cruciales en pratique, sont étudiées : régularité minimale, espaces fonctionnels, effet de linéarisation. L'originalité de notre approche bootstrap réside dans la construction de blocs temps-échelle, qui permet le calcul d'intervalles de confia
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Salama, Gouda Ismail Mohamed. "Monocular and Binocular Visual Tracking." Diss., Virginia Tech, 1999. http://hdl.handle.net/10919/37179.

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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 f
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Misulaitytė, Jurgita. "Rainelės atpažinimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2009. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2009~D_20090908_202938-29701.

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Šiame magistro baigiamajame darbe pateiktas darbo atlikimo planas, literatūros šaltinių apžvalga, aprašyti mano sukurti du rainelių segmentacijos metodai, teoriniai principai, kuriais jie remiasi ir programinis įrankis, kuris juos įgyvendina, su šiuo programiniu įrankiu atlikti tyrimai ir jų rezultatai. Vienas iš mano sukurtų rainelių segmentacijos metodų remiasi žymėmis kontroliuojama vandens takoskyros transformacija ir momentiniais invariantais. Derinant vandens takoskyros transformaciją su momentiniais invariantais rainelių segmentacijoje išvengiama slenksčių ar kitokių iš anksto nustatytų
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Kopečný, Josef. "Návrh nové metody pro stereovidění." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2008. http://www.nusl.cz/ntk/nusl-235903.

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This thesis covers with the problems of photogrammetry. It describes the instruments, theoretical background and procedures of acquiring, preprocessing, segmentation of input images and of the depth map calculating. The main content of this thesis is the description of the new method of stereovision. Its algorithm, implementation and evaluation of experiments. The covered method belongs to correlation based methods. The main emphasis lies in the segmentation, which supports the depth map calculation.
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Bigorgne, Erwan. "Détection et caractérisation de points singuliers pour l' appariement et l' indexation d' images couleurs." Paris 6, 2005. http://www.theses.fr/2005PA066270.

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Elmufti, Mohammed. "Perturbations of dark energy models." Thesis, University of Western Cape, 2012. http://hdl.handle.net/11394/3386.

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>Magister Scientiae - MSc<br>The growth of structure in the Universe proceeds via the collapse of dark matter and baryons. This process is retarded by dark energy which drives an accelerated expansion of the late Universe. In this thesis we use cosmological perturbation theory to investigate structure formation for a particular class of dark energy models, i.e. interacting dark energy models. In these models there is a non-gravitational interaction between dark energy and dark matter, which alters the standard evolution (with non-interacting dark energy) of the Universe. We consider a sim
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Bastos, Igor Leonardo Oliveira. "Reconhecimento de sinais da libras utilizando descritores de forma e redes neurais artificiais." Instituto de Matemática. Departamento de Ciência da Computação, 2015. http://repositorio.ufba.br/ri/handle/ri/19374.

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Submitted by Mayara Nascimento (mayara.nascimento@ufba.br) on 2016-05-31T14:15:01Z No. of bitstreams: 1 Igor Bastos - Dissertação VFinal.pdf: 3703212 bytes, checksum: a00013910865dacb8025d56659076abb (MD5)<br>Approved for entry into archive by Alda Lima da Silva (sivalda@ufba.br) on 2016-06-03T23:17:29Z (GMT) No. of bitstreams: 1 Igor Bastos - Dissertação VFinal.pdf: 3703212 bytes, checksum: a00013910865dacb8025d56659076abb (MD5)<br>Made available in DSpace on 2016-06-03T23:17:29Z (GMT). No. of bitstreams: 1 Igor Bastos - Dissertação VFinal.pdf: 3703212 bytes, checksum: a00013910865dacb
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Wendt, Herwig. "Contributions à l'analyse multifractale des coefficients d'ondelettes dominants et du bootstrap : Images, performances d'estimation, nombre de moments nuls et structure de dépendance. Intervalles de confiance et tests d'hypothèse." Phd thesis, Ecole normale supérieure de lyon - ENS LYON, 2008. http://tel.archives-ouvertes.fr/tel-00333599.

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L'invariance d'échelle constitue un paradigme souvent avancé pour l'analyse et la modélisation de données expérimentales issues d'applications de natures différentes. L'analyse multifractale fournit un cadre conceptuel pour ses études théorique et pratique. Dans ce contexte, l'objectif de cette thèse réside dans l'apport à l'analyse multifractale, de l'utilisation des coefficients d'ondelettes dominants, d'une part, et des techniques statistiques de type bootstrap, d'autre part. Dans la première partie de ce travail, les propriétés et performances statistiques de procédures d'analyse multifrac
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41

Navia, Ojeda Carlos Enrique. "Observações sobre característica de interações nucleares de alta energia ( Eej>10 Tev) : para eventos de grande massa invariante (M(y)>25Gev/c2) e de largo momento transversal (~O.5GeV/c)." [s.n.], 1985. http://repositorio.unicamp.br/jspui/handle/REPOSIP/277519.

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Orientadores: Cesare M. G. Lattes, Kotaro Sawayanag<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Fisica Gleb Wataghin<br>Made available in DSpace on 2018-07-17T06:22:04Z (GMT). No. of bitstreams: 1 NaviaOjeda_CarlosEnrique_D.pdf: 3099643 bytes, checksum: b97fd1b6b23b1cfc4d589b4892075315 (MD5) Previous issue date: 1985<br>Resumo: Realizamos uma análise sistemática sobre interações atmosféricas induzidas pela radiação cósmica e detectadas pela Colaboração Brasil-Japão, coma finalidade de obter parâmetros que caracterizem eventos tipo Guaçú (massa invariante sob a forma
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Keller, Julien. "Equations de type Vortex et métriques canoniques." Phd thesis, Université Paul Sabatier - Toulouse III, 2005. http://tel.archives-ouvertes.fr/tel-00012107.

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Soit $M$ une variété projective lisse. Soit $\mathscr{F}$ une filtration holomorphe sur $M$, c'est à dire une filtration d'un fibré vectoriel holomorphe $\mathcal{F}$ induite par des sous-fibrés. Nous introduisons une notion de Gieseker stabilité pour de tels objets puis donnons une condition analytique équivalente en terme de métriques sur $\mathcal{F}$, dites équilibrées au sens de S.K. Donaldson, provenant d'une construction de la Théorie des Invariants Géométriques. Si le fibré $\mathcal{F}$ peut être muni d'une métrique $h$ solution de l'équation $\boldsymbol{\tau}$-Hermite-Einstein étudi
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Hoang, Thai V. "Image Representations for Pattern Recognition." Phd thesis, Université Nancy II, 2011. http://tel.archives-ouvertes.fr/tel-00714651.

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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
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Prieur, Clementine. "APPLICATIONS STATISTIQUES DE SUITES FAIBLEMENT DEPENDANTES ET DE SYSTEMES DYNAMIQUES." Phd thesis, Université de Cergy Pontoise, 2001. http://tel.archives-ouvertes.fr/tel-00001436.

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Cette thèse porte sur l'étude<br />d'applications statistiques de suites dépendantes et<br />stationnaires. Nous étudions deux classes de suites<br />dépendantes. Nous nous intéressons d'une part à des suites<br />faiblement dépendantes, où notre notion de dépendance faible est<br />une variante de la notion introduite par Doukhan \& Louhichi, d'autre part à certains systèmes dynamiques<br />présentant une propriété de décroissance des<br />corrélations. Nous traitons du comportement asymptotique du<br />processus empirique, fondamental en statistiques. Nous étudions<br />aussi un estimateur à
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45

Shankar, H. N. "Adaptive Control Of A General Class Of Finite Dimensional Stable LTI Systems." Thesis, Indian Institute of Science, 2000. https://etd.iisc.ac.in/handle/2005/225.

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We consider the problem of Adaptive Control of finite-dimensional, stable, Linear Time Invariant (LTI) plants. Amongst such plants, the subclass regarding which an upper bound on the order is not known or which are known to be nonminimum phase (zeros in the unstable region) pose formidable problems in their own right. On one hand, if an upper bound on the order of the plant is not known, adaptive control usually involves some form of order estimation. On the other hand, when the plant is allowed to be either minimum phase or nonminimum phase, the adaptive control problem, as is well-known, bec
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46

Shankar, H. N. "Adaptive Control Of A General Class Of Finite Dimensional Stable LTI Systems." Thesis, Indian Institute of Science, 2000. http://hdl.handle.net/2005/225.

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We consider the problem of Adaptive Control of finite-dimensional, stable, Linear Time Invariant (LTI) plants. Amongst such plants, the subclass regarding which an upper bound on the order is not known or which are known to be nonminimum phase (zeros in the unstable region) pose formidable problems in their own right. On one hand, if an upper bound on the order of the plant is not known, adaptive control usually involves some form of order estimation. On the other hand, when the plant is allowed to be either minimum phase or nonminimum phase, the adaptive control problem, as is well-known, bec
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47

Cheung, Anthony Hing-lam. "Design and implementation of an Arabic optical character recognition system." Thesis, Queensland University of Technology, 1998. https://eprints.qut.edu.au/36073/1/36073_Cheung_1998.pdf.

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Character recognition is not a difficult task for humans who repeat the process thousands of times every day as they read papers or books. However, after more than 40 years of intensive investigation, there is still no machine that can recognize alphabetic characters as well as humans. Optical Character Recognition (OCR) is the process of converting a raster image representation of a document into a format that a computer can process. It involves many sub-disciplines of computer science including digital image processing, pattern recognition, natural language processing, artificial intelligen
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48

Samanta, Urmila. "Radial moments for invariant image analysis: computational and statistical aspects." 2013. http://hdl.handle.net/1993/22062.

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Zernike moments are sets of mathematical quantities that uniquely characterize an image. It is known that they are invariant under rotation and reflection and robust to noise. In this thesis several other algorithms have been used to calculate these moments. The intent of this thesis is: 1. to use the classical method and the algorithms to reconstruct an image using Zernike moments and study their accuracy and 2. to examine if the invariance and noise insensitivity property of the calculated Zernike moments are upheld by these procedures. It is found that the constructed images using t
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Lin, You-Tsai, and 林猷財. "Image Rotation Angle Estimation Using Rotation Invariant Features of Zernike Moments." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/10622265211779462331.

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碩士<br>國立交通大學<br>電機與控制工程系<br>89<br>An estimation approach of image rotation angle is proposed here. A basic assumption that the center of image rotation must be known is made, so that we can estimate the precise image rotation angles from the comparison between the rotated images and the reference one. Furthermore, the Zernike moment algorithm with subsampling and interpolation techniques can increase the image resolution and compute Zernike moments more accurately on the premise that keep the image acquiring hardware instrument unchanged. In addition, a K-means clustering algorithm is used to
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Höschl, Cyril. "Pokročilé momentové metody pro analýzu obrazu." Doctoral thesis, 2018. http://www.nusl.cz/ntk/nusl-373756.

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The Thesis consists of an introduction and four papers that contribute to the research of image moments and moment invariants. The first two papers focus on rectangular decomposition algorithms that rapidly speed up the moment calculations. The other two papers present a design of new moment invariants. We present a comparative study of cutting edge methods for the decomposition of 2D binary images, including original implementations of all the methods. For 3D binary images, finding the optimal decomposition is an NP-complete problem, hence a polynomial-time heuristic needs to be developed. We
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