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Dissertations / Theses on the topic 'Digital images'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Travisani, Tatiana Giovannone [UNESP]. "Imagem digital em movimento." Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/86983.

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Made available in DSpace on 2014-06-11T19:22:29Z (GMT). No. of bitstreams: 0 Previous issue date: 2008-04Bitstream added on 2014-06-13T19:27:53Z : No. of bitstreams: 1 travisani_tg_me_ia.pdf: 2449318 bytes, checksum: 3292e9571a4159da36b4a5591c796aee (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Este trabalho reúne análises sobre as imagens digitais com questões estruturais e poéticas do movimento, fazendo um levantamento histórico e artístico desde os primeiros experimentos em cronofotografia, até as manifestações atuais, do universo digital, que incorporam

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Moëll, Mattias. "Digital image analysis for wood fiber images /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 2001. http://epsilon.slu.se/avh/2001/91-576-6309-2.pdf.

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3

Bourne, John D. A. "Processing digital images." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1996. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq22757.pdf.

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4

Kailasanathan, Chandrapal. "Securing digital images." Access electronically, 2003. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20041026.150935/index.html.

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5

Travisani, Tatiana Giovannone. "Imagem digital em movimento /." São Paulo : [s.n.], 2008. http://hdl.handle.net/11449/86983.

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Orientador: Milton Terumitsu Sogabe<br>Banca: Pelópidas Cypriano de Oliveira<br>Banca: Silvia Laurentz<br>Resumo: Este trabalho reúne análises sobre as imagens digitais com questões estruturais e poéticas do movimento, fazendo um levantamento histórico e artístico desde os primeiros experimentos em cronofotografia, até as manifestações atuais, do universo digital, que incorporam o movimento como temática. A imagem digital tratada não é de cunho sintético, mas sim que passou por algum processo de captura analógica, por meio de câmeras, e após isso, foi digitalizada. A partir daí, a pesquisa ref

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6

Zain, Jasni Mohamad. "Digital watermarking in medical images." Thesis, Brunel University, 2005. http://bura.brunel.ac.uk/handle/2438/4978.

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This thesis addresses authenticity and integrity of medical images using watermarking. Hospital Information Systems (HIS), Radiology Information Systems (RIS) and Picture Archiving and Communication Systems (P ACS) now form the information infrastructure for today's healthcare as these provide new ways to store, access and distribute medical data that also involve some security risk. Watermarking can be seen as an additional tool for security measures. As the medical tradition is very strict with the quality of biomedical images, the watermarking method must be reversible or if not, region of

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7

Condell, Joan V. "Motion tracking in digital images." Thesis, University of Ulster, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274406.

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8

Ahmed, Kamal Ali. "Digital watermarking of still images." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/digital-watermarking-of-still-images(0dc4b146-3d97-458f-9506-8c67bc3a155b).html.

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This thesis presents novel research work on copyright protection of grey scale and colour digital images. New blind frequency domain watermarking algorithms using one dimensional and two dimensional Walsh coding were developed. Handwritten signatures and mobile phone numbers were used in this project as watermarks. In this research eight algorithms were developed based on the DCT using 1D and 2D Walsh coding. These algorithms used the low frequency coefficients of the 8 × 8 DCT blocks for embedding. A shuffle process was used in the watermarking algorithms to increase the robustness against th

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9

Stokes, Mike. "Colorimetric tolerances of digital images /." Online version of thesis, 1991. http://hdl.handle.net/1850/10896.

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10

Cembalo, Maurizio. "Forensic analysis for digital images." Doctoral thesis, Universita degli studi di Salerno, 2011. http://hdl.handle.net/10556/227.

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IX n.s.<br>Nowadays, taking and sharing digital pictures is becoming a very popular activity. This is witnessed by the explosive growth of the digital cameras market: e.g., more than one billion of digital cameras have been produced and shipped in 2010. A consequence of this trend is that also the number of crimes involving digital pictures increases, either because pictures are part of the crime (e.g., exchanging pedopornographic pictures) or because their analysis may reveal some important clue about the author of the crime. The highly technical nature of computer crimes facilitated a

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11

Wyllie, Michael. "A comparative quantitative approach to digital image compression." Huntington, WV : [Marshall University Libraries], 2006. http://www.marshall.edu/etd/descript.asp?ref=719.

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12

Pedron, Ilario. "Digital image processing for cancer cell finding using color images." Thesis, McGill University, 1988. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61720.

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13

Ahtaiba, Ahmed Mohamed A. "Restoration of AFM images using digital signal and image processing." Thesis, Liverpool John Moores University, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.604322.

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All atomic force microscope (AFM) images suffer from distortions, which are principally produced by the interaction between the measured sample and the AFM tip. If the three-dimensional shape of the tip is known, the distorted image can be processed and the original surface form ' restored' typically by deconvolution approaches. This restored image gives a better representation of the real 3D surface or the measured sample than the original distorted image. In this thesis, a quantitative investigation of using morphological deconvolution has been used to restore AFM images via computer simulat

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14

Vernacotola, Mark J. "Characterization of digital film scanner systems for use with digital scene algorithms /." Online version of thesis, 1995. http://hdl.handle.net/1850/11967.

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15

Khire, Sourabh Mohan. "Time-sensitive communication of digital images, with applications in telepathology." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/29761.

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Thesis (M. S.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2010.<br>Committee Chair: Jayant, Nikil; Committee Member: Anderson, David; Committee Member: Lee, Chin-Hui. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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16

Keskinarkaus, A. (Anja). "Digital watermarking techniques for printed images." Doctoral thesis, Oulun yliopisto, 2013. http://urn.fi/urn:isbn:9789526200583.

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Abstract During the last few decades, digital watermarking techniques have gained a lot of interest. Such techniques enable hiding imperceptible information to images; information which can be extracted later from those images. As a result, digital watermarking techniques have many interesting applications for example in Internet distribution. Contents such as images are today manipulated mainly in digital form; thus, traditionally, the focus of watermarking research has been the digital domain. However, a vast amount of images will still appear in some physical format such as in books, poster

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17

Allott, David. "Efficient source coding for digital images." Thesis, Loughborough University, 1985. https://dspace.lboro.ac.uk/2134/27563.

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A requirement exists for interactive view-data systems to incorporate some facility for the transmission of good quality multi-level single-frame images (both monochrome and colour) for both general information services and more commercial applications such as mail order catalogues.

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18

Mahfoudi, Gaël. "Authentication of Digital Images and Videos." Thesis, Troyes, 2021. http://www.theses.fr/2021TROY0043.

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Les médias digitaux font partie de notre vie de tous les jours. Après des années de photojournalisme, nous nous sommes habitués à considérer ces médias comme des témoignages objectifs de la réalité. Cependant les logiciels de retouches d'images et de vidéos deviennent de plus en plus puissants et de plus en plus simples à utiliser, ce qui permet aux contrefacteurs de produire des images falsifiées d'une grande qualité. L'authenticité de ces médias ne peut donc plus être prise pour acquise. Récemment, de nouvelles régulations visant à lutter contre le blanchiment d'argent ont vu le jour. Ces ré

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19

Naderi, Ramin. "Quadtree-based processing of digital images." PDXScholar, 1986. https://pdxscholar.library.pdx.edu/open_access_etds/3590.

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Image representation plays an important role in image processing applications, which usually. contain a huge amount of data. An image is a two-dimensional array of points, and each point contains information (eg: color). A 1024 by 1024 pixel image occupies 1 mega byte of space in the main memory. In actual circumstances 2 to 3 mega bytes of space are needed to facilitate the various image processing tasks. Large amounts of secondary memory are also required to hold various data sets. In this thesis, two different operations on the quadtree are presented. There are, in general, two types of dat

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20

Phan, Quoc-Tin. "On the provenance of digital images." Doctoral thesis, University of Trento, 2019. http://eprints-phd.biblio.unitn.it/3590/1/PHAN_thesis.pdf.

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Digital images are becoming the most commonly used multimedia data nowadays thanks to the massive manufacturing of cheap acquisition devices coupled with the unprecedented popularity of Online Social Networks. As two sides of a coin, massive use of digital images triggers the development of user-friendly editing tools and intelligent techniques that violate image authenticity. By this respect, digital images are less and less trustable as they are easily modified not only by experts or researchers, but also by unexperienced users. It has been also witnessed that malicious use of images has tre

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21

Bravo-Solorio, Sergio. "Integrity verification of digital images through fragile watermarking and image forensics." Thesis, University of Liverpool, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.548781.

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22

Nasir, Ibrahim A. "Digital Watermarking of Images towards Content Protection." Thesis, University of Bradford, 2010. http://hdl.handle.net/10454/4432.

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With the rapid growth of the internet and digital media techniques over the last decade, multimedia data such as images, video and audio can easily be copied, altered and distributed over the internet without any loss in quality. Therefore, protection of ownership of multimedia data has become a very significant and challenging issue. Three novel image watermarking algorithms have been designed and implemented for copyright protection. The first proposed algorithm is based on embedding multiple watermarks in the blue channel of colour images to achieve more robustness against attacks. The seco

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Nasir, Ibrahim Alsonosi. "Digital watermarking of images towards content protection." Thesis, University of Bradford, 2010. http://hdl.handle.net/10454/4432.

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With the rapid growth of the internet and digital media techniques over the last decade, multimedia data such as images, video and audio can easily be copied, altered and distributed over the internet without any loss in quality. Therefore, protection of ownership of multimedia data has become a very significant and challenging issue. Three novel image watermarking algorithms have been designed and implemented for copyright protection. The first proposed algorithm is based on embedding multiple watermarks in the blue channel of colour images to achieve more robustness against attacks. The seco

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24

Udas, Swati. "Classification algorithms for finding the eye fixation from digital images /." free to MU campus, to others for purchase, 2003. http://wwwlib.umi.com/cr/mo/fullcit?p1418072.

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25

Haddad, Nicholas. "Transmission of digital images using data-flow architecture." Ohio : Ohio University, 1985. http://www.ohiolink.edu/etd/view.cgi?ohiou1184007755.

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26

Brisbane, Gareth Charles Beattie. "On information hiding techniques for digital images." Access electronically, 2004. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20050221.122028/index.html.

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27

Noriega, Leonardo Antonio. "The colorimetric segmentation of textured digital images." Thesis, Southampton Solent University, 1998. http://ssudl.solent.ac.uk/2444/.

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This study approaches the problem of colour image segmentation as a pattern recognition task. This leads to the problem being broken down into two component parts: feature extraction and classification algorithms. Measures to enable the objective assessment of segmentation algorithms are considered. In keeping with this pattern-recognition based philosophy, the issue of texture is approached by a consideration of features, follwed by experimentation based on classification. Techniques based on Gabor filters and fractal dimension are compared. Also colour is considered in terms of its features,

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28

Morgado, Ana M. de O. "Automated procedures for orientation of digital images." Thesis, University College London (University of London), 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.339803.

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29

Al-Farhan, Haya M. "Digital images assessment of posterior capsule opacification." Thesis, City University London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.397670.

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30

Khayeat, Ali. "Copy-move forgery detection in digital images." Thesis, Cardiff University, 2017. http://orca.cf.ac.uk/107043/.

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The ready availability of image-editing software makes it important to ensure the authenticity of images. This thesis concerns the detection and localization of cloning, or Copy-Move Forgery (CMF), which is the most common type of image tampering, in which part(s) of the image are copied and pasted back somewhere else in the same image. Post-processing can be used to produce more realistic doctored images and thus can increase the difficulty of detecting forgery. This thesis presents three novel methods for CMF detection, using feature extraction, surface fitting and segmentation. The Dense Sc

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Gonçalves, Bruno Filipe Pimparel. "Digital imaging processing tools for neuronal images." Master's thesis, Universidade de Aveiro, 2012. http://hdl.handle.net/10773/10584.

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Mestrado em Biomedicina Molecular<br>Os neurónios são celulas especializadas do Sistema Nervoso, cujas funções se baseiam na correta formação de três compartimentos subcelulares primários – corpo celular, axónio e dendrites – e na rede neuronal que formam para passar a informação entre si. A análise quantitativa das características destas estruturas pode ser usada para estudar a relação entre a morfologia e função neuronal, e monitorizar alterações que ocorram em células individuais ou ao nível da rede, que se possam correlacionar com doenças neurológicas. Nesta tese foi efetuada uma p

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Wu, Yiyan Carleton University Dissertation Engineering Electrical. "Multi-stage hybrid coding of digital images." Ottawa, 1990.

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33

Yau, Chin-ko, and 游展高. "Super-resolution image restoration from multiple decimated, blurred and noisy images." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B30292529.

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Kim, Kyu-Heon. "Segmentation of natural texture images using a robust stochastic image model." Thesis, University of Newcastle Upon Tyne, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307927.

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35

Tsujiguchi, Vitor Hitoshi. "Identificação da correlação entre as características das imagens de documentos e os impactos na fidelidade visual em função da taxa de compressão." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/3/3141/tde-19032012-112737/.

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Imagens de documentos são documentos digitalizados com conteúdo textual. Estes documentos são compostos de caracteres e diagramação, apresentando características comuns entre si, como a presença de bordas e limites no formato de cada caractere. A relação entre as características das imagens de documentos e os impactos do processo de compressão com respeito à fidelidade visual são analisadas nesse trabalho. Métricas objetivas são empregadas na análise das características das imagens de documentos, como a medida da atividade da imagem (IAM) no domínio espacial dos pixels, e a verificação da medi

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Mohamed, Aamer S. S. "From content-based to semantic image retrieval. Low level feature extraction, classification using image processing and neural networks, content based image retrieval, hybrid low level and high level based image retrieval in the compressed DCT domain." Thesis, University of Bradford, 2010. http://hdl.handle.net/10454/4438.

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Digital image archiving urgently requires advanced techniques for more efficient storage and retrieval methods because of the increasing amount of digital. Although JPEG supply systems to compress image data efficiently, the problems of how to organize the image database structure for efficient indexing and retrieval, how to index and retrieve image data from DCT compressed domain and how to interpret image data semantically are major obstacles for further development of digital image database system. In content-based image, image analysis is the primary step to extract useful information from

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37

Brichta, Simone de FÃtima. "Youths in dialogue: digital educational practices and tessitura imagery." Universidade Federal do CearÃ, 2015. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=15424.

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nÃo hÃ<br>This research with youths unfolds itself in an analysis of digital educational practices (DEPs) about mediating possibilities of art through images. Pictures are taken as meaningful through the production of audiovisual narratives, shared on socialnetworks by young high school students. The DEPs are addressed from EMdiÃlogo Portal, as practice of youths observatory, operating in national territory network of universities, with support of the Ministry of Education - MEC. In Fortaleza, that was conducted in partnership with the Federal University of CearÃ - UFC, having as central scena

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38

Smith, Jeffrey Statler. "Multi-camera: interactive rendering of abstract digital images." Thesis, Texas A&M University, 2003. http://hdl.handle.net/1969.1/341.

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The purpose of this thesis is the development of an interactive computer-generated rendering system that provides artists with the ability to create abstract paintings simply and intuitively. This system allows the user to distort a computer-generated environment using image manipulation techniques that are derived from fundamentals of expressionistic art. The primary method by which these images will be abstracted stems from the idea of several small images assembled into a collage that represents multiple viewing points rendered simultaneously. This idea has its roots in the multiple-perspec

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Kiraci, Ali Coskun. "Direct Georeferencing And Orthorectification Of Airborne Digital Images." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12609972/index.pdf.

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GPS/INS (Global Positioning System / Inertial Navigation System) brings possibility of relaxing the demand for aerial triangulation in stereo model construction and rectification. In this thesis a differential rectification algorithm is programmed with Matlab software for aerial frame camera images. This program is tested using exterior orientation parameters obtained by GPS/INS and images are ortho-rectified. Ground Control Points (GCP) are measured in the orthorectified images and compared with other rectification methods according to RMSE and mean error. Besides, direct georeferencing accur

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Heiss, Detlef Guntram. "Calibrating the photographic reproduction of colour digital images." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/24680.

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Colour images can be formed by the combination of stimuli in three primary colours. As a result, digital colour images are typically represented as a triplet of values, each value corresponding to the stimulus of a primary colour. The precise stimulus that the eye receives as a result of any particular triplet of values depends on the display device or medium used. Photographic film is one such medium for the display of colour images. This work implements a software system to calibrate the response given to a triplet of values by an arbitrary combination of film recorder and film, in terms of

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41

Rey, Claudio Gustavo. "Noise filtering with edge preservation in digital images." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/26322.

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The widespread use of the absolute gradient and the sample variance in present day local noise filters in digital image processing is pointed out. It is shown that the sample variance and the absolute gradient can be viewed as measures of the modelling error for a simple zeroth order local image model. This is shown to lead to a general formulation of local noise filtering applicable to the great majority of current local noise niters for digital images. This formulations describes local noise filtering as a two step process. In the first step a robust estimation of every pixel z[sub o] is obt

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Pacheco-Martínez, Ana María. "Extracting cell complexes from 4-dimensional digital images." Thesis, Poitiers, 2012. http://www.theses.fr/2012POIT2262/document.

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Une image numérique peut être définie comme un ensemble de n-xels sur une grille constituée de n-cubes. La segmentation consiste à calculer une partition d'une image en régions. Les n-xels ayant des caractéristiques similaires (couleur, intensité, etc.) sont regroupés. Schématiquement, à chaque n-xel est attribuée une étiquette, et chaque région de l'image est constituée de n-xels de même étiquette. Les méthodes "de type" Marching cubes et Kenmochi et al. construisent des complexes représentant la topologie de la région d'intérêt d'une image numérique binaire de dimension 3. Dans la première m

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McKoen, K. M. H. H. "Digital restoration of low light level video images." Thesis, Imperial College London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343720.

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Qadir, Ghulam. "Digital foresnic analysis for compressed images and videos." Thesis, University of Surrey, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.604341.

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The advancement of imaging devices and image manipulation software has made the tasks of tracking and protecting of digital multimedia content becoming increasingly difficult. In order to protect and verify the integrity of the digital content, many active watermarking and passive forensic techniques have been developed for various image and video formats in the past decade or so. In this thesis, we focus on the research and development of digit.al image forensic techniques, particularly for the processing history recovery of JPEG2000 (J2I<) images. J2K is a. new and improved format introduced

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45

Goodson, Kelvin J. "Automated interpretation of digital images of hydrographic charts." Thesis, Bournemouth University, 1987. http://eprints.bournemouth.ac.uk/382/.

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Details of research into the automated generation of a digital database of hydrographic charts is presented. Low level processing of digital images of hydrographic charts provides image line feature segments which serve as input to a semi-automated feature extraction system, (SAFE). This system is able to perform a great deal of the building of chart features from the image segments simply on the basis of proximity of the segments. The system solicits user interaction when ambiguities arise. IThe creation of an intelligent knowledge based system (IKBS) implemented in the form of a backward cha

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Coleman, Sonya. "Scalable operators for adaptive processing of digital images." Thesis, University of Ulster, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.270447.

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Conradie, Johannes Hendrik. "Characterising failure of structural materials using digital images." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/96755.

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Thesis (MEng)--Stellenbosch University, 2015.<br>ENGLISH ABSTRACT: The fracture of ductile materials is currently regarded as a complex and challenging phenomenon to characterise and predict. Recently, a bond-based, non-local theory was formulated called the peridynamic theory, which is able to directly solve solid mechanics problems that include fracture. The failure criterion is governed by a critical stretch relation between bonds. It was found in literature that the critical stretch relates to the popular fracture mechanics parameter called the critical energy release rate for predict

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Rieger, James L., and Sherri Gattis. "Draft Standard for Digital Transmission of Television Images." International Foundation for Telemetering, 1988. http://hdl.handle.net/10150/615074.

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International Telemetering Conference Proceedings / October 17-20, 1988 / Riviera Hotel, Las Vegas, Nevada<br>This paper describes the characteristics of the HORACE digital protocol intended for transmission of black-and-white standard television images and associated data through a digital channel and reconstruction of an NTSC standard television picture at the receiving end, using adaptive transmission to allow maximum picture quality at a selected data rate. Tradeoffs are discussed for transmission rates in the range from near DC to over 40 Mbits/second. The HORACE protocol will be a govern

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Forbes, Keith. "Volume estimation of fruit from digital profile images." Master's thesis, University of Cape Town, 2000. http://hdl.handle.net/11427/5220.

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Includes bibliographical references.<br>This dissertation investigates the feasibility of using the same digital profile images of fruit that are used in commercial packing houses for colour sorting and blemish detection purposes to estimate the volumes of the corresponding individual pieces of fruit, Data sets of actual fruit volumes and digitial images of the fruit that simulate both single and multiple camera set-ups are obtained.

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Teo, Chek Koon. "Digital enhancement of night vision and thermal images." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Dec%5FTeo%5FChek.pdf.

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Thesis (M.S. in Combat Systems Technology)--Naval Postgraduate School, December 2003.<br>Thesis advisor(s): Monique P. Fargues, Alfred W. Cooper. Includes bibliographical references (p. 75-76). Also available online.

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