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Dissertations / Theses on the topic 'JPEG'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Caplan, Paul Lomax. "JPEG : the quadruple object." Thesis, Birkbeck (University of London), 2013. http://bbktheses.da.ulcc.ac.uk/32/.

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The thesis, together with its practice-research works, presents an object-oriented perspective on the JPEG standard. Using the object-oriented philosophy of Graham Harman as a theoretical and also practical starting point, the thesis looks to provide an account of the JPEG digital object and its enfolding within the governmental scopic regime. The thesis looks to move beyond accounts of digital objects and protocols within software studies that position the object in terms of issues of relationality, processuality and potentiality. From an object-oriented point of view, the digital object must

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Günther, Emanuel. "Entwicklung eines JPEG-Dateianalysators." Hochschule für Technik und Wirtschaft, 2021. https://htw-dresden.qucosa.de/id/qucosa%3A76129.

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Die Arbeit befasst sich mit der Verbesserung und Erweiterung eines bestehenden Softwareprojektes zum Streaming von JPEG-Bildern per RTP. In diesem Projekt werden JPEG-Bilder aus MJPEG-Dateien von einem Server zum Client übertragen. Um eine fehlerfreie Übertragung zu gewährleisten, soll zuvor die Eignung der Dateien für eine solche geprüft werden. Die entsprechenden Anforderungen finden sich in RFC 2435, welcher die Übertragung von JPEG-Bildern per RTP standardisiert. Zur Automatisierung der Überprüfung wurde diese in einem eigenen Programm implementiert. Weitere Verbesserungen wurden hinsichtl

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Jirák, Jakub. "Alternativní JPEG kodér/dekodér." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-317121.

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The JPEG codec is currently the most widely used image format. This work deals with the design and implementation of an alternative JPEG codec using proximal algorithms in combination with the fixation of points from the original image to suppression of artifacts created in common JPEG coding. To solve the problem, the prox_TV and then the Douglas-Rachford algorithm were used, for which special functions using l_1-norm for image reconstruction were derived. The results of the proposed solution are very good because they can effectively suppress the artefacts created and the result corresponds

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Tong, Henry Hoi-Yu. "A perceptually adaptive JPEG coder." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ29417.pdf.

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Tuladhar, Punnya. "Nonattribution Properties of JPEG Quantization Tables." ScholarWorks@UNO, 2010. http://scholarworks.uno.edu/td/1261.

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In digital forensics, source camera identification of digital images has drawn attention in recent years. An image does contain information of its camera and/or editing software somewhere in it. But the interest of this research is to find manufacturers (henceforth will be called make and model) of a camera using only the header information, such as quantization table and huffman table, of the JPEG encoding. Having done research on around 110, 000 images, we reached to state that "For all practical purposes, using quantization and huffman tables alone to predict a camera make and model isn't a

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Goodenow, Daniel P. "A reference guide to JPEG compression /." Online version of thesis, 1993. http://hdl.handle.net/1850/11714.

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Nguyen, Anthony Ngoc. "Importance Prioritised Image Coding in JPEG 2000." Thesis, Queensland University of Technology, 2005. https://eprints.qut.edu.au/16005/1/Anthony_Nguyen_Thesis.pdf.

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Importance prioritised coding is a principle aimed at improving the interpretability (or image content recognition) versus bit-rate performance of image coding systems. This can be achieved by (1) detecting and tracking image content or regions of interest (ROI) that are crucial to the interpretation of an image, and (2)compressing them in such a manner that enables ROIs to be encoded with higher fidelity and prioritised for dissemination or transmission. Traditional image coding systems prioritise image data according to an objective measure of distortion and this measure does not correlate w

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Nguyen, Anthony Ngoc. "Importance Prioritised Image Coding in JPEG 2000." Queensland University of Technology, 2005. http://eprints.qut.edu.au/16005/.

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Importance prioritised coding is a principle aimed at improving the interpretability (or image content recognition) versus bit-rate performance of image coding systems. This can be achieved by (1) detecting and tracking image content or regions of interest (ROI) that are crucial to the interpretation of an image, and (2)compressing them in such a manner that enables ROIs to be encoded with higher fidelity and prioritised for dissemination or transmission. Traditional image coding systems prioritise image data according to an objective measure of distortion and this measure does not correlate w

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Nguyen, Ricky D. (Ricky Do). "Rate control and bit allocations for JPEG transcoding." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/41667.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2007.<br>Includes bibliographical references (leaves 50-51).<br>An image transcoder that produces a baseline JPEG file from a baseline JPEG input is developed. The goal is to produce a high quality image while accurately meeting a filesize target and keeping computational complexity-especially the memory usage and number of passes at the input image--low. Building upon the work of He and Mitra, the JPEG transcoder exploits a linear relationship between the number of zero-valued quanti

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Oh, Han, Ali Bilgin, and Michael Marcellin. "Visually Lossless JPEG 2000 for Remote Image Browsing." MDPI AG, 2016. http://hdl.handle.net/10150/621987.

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Image sizes have increased exponentially in recent years. The resulting high-resolution images are often viewed via remote image browsing. Zooming and panning are desirable features in this context, which result in disparate spatial regions of an image being displayed at a variety of ( spatial) resolutions. When an image is displayed at a reduced resolution, the quantization step sizes needed for visually lossless quality generally increase. This paper investigates the quantization step sizes needed for visually lossless display as a function of resolution, and proposes a method that effective

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Gondlyala, Siddharth Rao. "Enhancing the JPEG Ghost Algorithm using Machine Learning." Thesis, Blekinge Tekniska Högskola, Institutionen för datavetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-20692.

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Background: With the boom in the internet space and social media platforms, a large number of images are being shared. With this rise and advancements in technology, many image editing tools have made their way to giving rise to digital image manipulation. Being able to differentiate a forged image is vital to avoid misinformation or misrepresentation. This study focuses on the splicing image forgery to localizes the forged region in the tampered image. Objectives: The main purpose of the thesis is to extend the capability of the JPEG Ghost model by localizing the tampering in the image. This

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Zakaria, Ahmad. "Batch steganography and pooled steganalysis in JPEG images." Thesis, Montpellier, 2020. http://www.theses.fr/2020MONTS079.

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RÉSUMÉ :La stéganographie par lot consiste à dissimuler un message en le répartissant dans un ensemble d’images, tandis que la stéganalyse groupée consiste à analyser un ensemble d’images pour conclure à la présence ou non d’un message caché. Il existe de nombreuses stratégies d’étalement d’un message et on peut raisonnablement penser que le stéganalyste ne connaît pas celle qui est utilisée, mais il peut supposer que le stéganographe utilise le même algorithme d’insertion pour toutes les images. Dans ce cas, on peut montrer que la solution la plus appropriée pour la stéganalyse groupée est d’

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Nilsson, Henrik. "Gaze-based JPEG compression with varying quality factors." Thesis, Blekinge Tekniska Högskola, Institutionen för datavetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-18237.

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Background: With the rise of streaming services such as cloud gaming, a fast internet speed is required for the overall experience. The average internet connection is not suited for the requirements that cloud gaming require. A high quality and frame rate is important for the experience. A solution to this problem would be to have parts where the user is looking at in a image be displayed in higher quality compared to the rest of the image. Objectives: The objective of this thesis is to create a gaze-based lossy image compression algorithm that reduces quality where the user is not looking. By

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Kinney, Albert C. "Analysis of M-JPEG video over an ATM network." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2001. http://handle.dtic.mil/100.2/ADA392117.

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Thesis (M.S. in Electrical Engineering) Naval Postgraduate School, June 2001.<br>Thesis advisor(s): McEachen, John C. "June 2001." Includes bibliographical references (p. 83-84). Also Available in print.

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Andersson, Mikael, and Per Karlström. "Parallel JPEG Processing with a Hardware Accelerated DSP Processor." Thesis, Linköping University, Department of Electrical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2615.

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<p>This thesis describes the design of fast JPEG processing accelerators for a DSP processor. </p><p>Certain computation tasks are moved from the DSP processor to hardware accelerators. The accelerators are slave co processing machines and are controlled via a new instruction set. The clock cycle and power consumption is reduced by utilizing the custom built hardware. The hardware can perform the tasks in fewer clock cycles and several tasks can run in parallel. This will reduce the total number of clock cycles needed. </p><p>First a decoder and an encoder were implemented in DSP assembler. Th

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Yu, Lang. "Evaluating and Implementing JPEG XR Optimized for Video Surveillance." Thesis, Linköping University, Computer Engineering, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-54307.

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<p>This report describes both evaluation and implementation of the new coming image compression standard JPEG XR. The intention is to determine if JPEG XR is an appropriate standard for IP based video surveillance purposes. Video surveillance, especially IP based video surveillance, currently has an increasing role in the security market. To be a good standard for surveillance, the video stream generated by the camera is required to be low bit-rate, low latency on the network and at the same time keep a high dynamic display range. The thesis start with a deep insightful study of JPEG XR encodi

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Tovslid, Magnus Jeffs. "JPEG 2000 Quality Scalability in an IP Networking Scenario." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for elektronikk og telekommunikasjon, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-18465.

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In this thesis, the JPEG 2000 quality scalability feature was investigated in thecontext of transporting video over IP networks. The goals of the investigation wastwo-fold. First, it was desired to nd a way of choosing the number of quality layersto embed in a JPEG 2000 codestream. In previous work, this choice has been moreor less arbitrary. Second, it was desired to nd how low the video bitrate could bedropped before it became perceptible to a viewer. This information can be usedin an IP networking scenario to e.g. adapt the video bitrate blindly according tothe measured channel capacity as

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Žičevičius, Linas. "Atvirojo kodo JPEG realizacijų, aprašytų aparatūros aprašymo kalbomis, tyrimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2013. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2012~D_20131104_110054-48993.

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Šiame technologijų amžiuje vis daugiau technologijų sąveikauja su aplinka. Tai įvairūs prietaisai, sistemos, robotai, kurie geba apdoroti vaizdinę informaciją ir/arba ją interpretuoti. Kadangi vaizdinė informacija užima labai daug kietojo disko vietos, palyginus su kitokios rūšies informacija, iškyla jos saugojimo bei parsiuntimo problemos. Šioms problemoms spręsti pasitelkiamas duomenų glaudinimas (data compression). Šie sprendimai gali būti įgyvendinti programiškai (software) ir aparatūriškai (hardware). Aparatūriniai sprendimai pasižymi dideliu greičiu taip pat panaudojimo galimybėmis. Kada

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Aouadi, Imed. "Optimisation de JPEG 2000 sur système sur puce programmable." Paris 11, 2005. https://pastel.archives-ouvertes.fr/pastel-00001658.

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Récemment le domaine du traitement de l’image, de la vidéo, et l’audio a connu plusieurs évolutions importantes au niveau des algorithmes et des architectures. L’une de ces évolutions est l’apparition du nouveau standard ISO/IEC de compression d’image JPEG2000 qui succède à JPEG. Ce nouveau standard présente de nombreuses fonctionnalités et caractéristiques qui lui permettent d’être adapté à une large panoplie d’applications. Mais ces caractéristiques se sont accompagnées d’une complexité algorithmique beaucoup plus élevée que JPEG et qui le rend très difficile à optimiser pour certaines implé

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Taylor, James Cary, Jacklynn Hall, and Tony Yuan. "Dean's Innovation Challenge: Researching the JPEG 2000 Image Decoder." Thesis, The University of Arizona, 2012. http://hdl.handle.net/10150/244833.

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The goal of this thesis is to analyze the current commercialization process of the University of Arizona as well as the Office of Technology Transfer, or OTT, and potential opportunities for strengthening the process. This will be done through an initial review of a patented technology, JPEG 2000 Corrupt Codestream Decoder, as well as its parent technology, JPEG 2000 image standard. The JPEG 2000 decoder is used to decode corrupt images that are transferred in real time, in order to utilize the "usable" information as efficiently as possible. The technology itself will be analyzed, including t

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Fawcett, Roger James. "Efficient practical image compression." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365711.

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Agostini, Luciano Volcan. "Projeto de arquiteturas integradas para a compressão de imagens JPEG." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2002. http://hdl.handle.net/10183/11431.

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Esta dissertação apresenta o desenvolvimento de arquiteturas para a compressão JPEG, onde são apresentadas arquiteturas de um compressor JPEG para imagens em tons de cinza, de um compressor JPEG para imagens coloridas e de um conversor de espaço de cores de RGB para YCbCr. As arquiteturas desenvolvidas são detalhadamente apresentadas, tendo sido completamente descritas em VHDL, com sua síntese direcionada para FPGAs da família Flex10KE da Altera. A arquitetura integrada do compressor JPEG para imagens em tons de cinza possui uma latência mínima de 237 ciclos de clock e processa uma imagem de 6

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Haddad, Sahar. "Protection of encrypted and/or compressed medical images by means of watermarking." Thesis, Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2020. http://www.theses.fr/2020IMTA0184.

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L’évolution des technologies du multimédia et des communications s’exprime dans le domaine de la santé par la mise à disposition de nouveaux moyens de partage et d’accès distant aux données de l’imagerie médicale. Dans un tel contexte, la question de la sécurité de ces données est particulièrement sensible, notamment en termes de confidentialité, fiabilité et traçabilité. Ces travaux de thèse ont trait à la combinaison voire la fusion de tatouage et de chiffrement de données pour la protection des images médicales. Cependant, le déploiement de ces mécanismes de sécurité dans le domaine de la s

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CHEN, MAO-XIONG, and 陳茂雄. "The investigation of JPEG and JPEG-TEC system." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/86000106695283386379.

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Chou, Chin-tai, and 周清泰. "JPEG Study on Reducing Blocking Artifacts in JPEG Decoded Images." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/74381511550239526258.

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碩士<br>國立高雄第一科技大學<br>電腦與通訊工程所<br>93<br>Block-based image coding system, such as JPEG, MPEG, VQ-coder, H.263, and H.246, etc., easily causes the degradation of reconstruction image in high compression ratio (low bit-rate). So there is a discontinuous condition between block and block, which is called the blocking artifacts. In this thesis, we propose two new methods to improve the blocking artifacts, including: the methods using four-point discrete cosine transform (DCT) and using standard deviation equalizer. The DCT has the property of energy compaction on low-frequency coefficients for

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Chang, Ih-Hwa, and 張益華. "Adaptive JPEG coding system." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/30356233472343637102.

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碩士<br>國立中央大學<br>電機工程研究所<br>83<br>JPEG has become the industrial standard for still image compression. At medium bitrate, JPEG performs well. At low bitrate, on the other hand, JPEG suffers from serious blocking effects. In this thesis, we present a JPEG-based coding system. By adding pre-/post- processing on JPEG, a simple and easy to implement system is constructed. The pre-/post- processing schemes employ two techniques - classification and subsampling. An input image is segmented into hi

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Lin, Zih-Chen, and 林子辰. "Fast JPEG 2000 Encryptor." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/03990532894756652275.

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碩士<br>國防大學中正理工學院<br>電子工程研究所<br>96<br>With the progress of information science, the network has become important. The image security is getting more important too. The image compression technologies change with each passing day. They do not only improve compression efficiency, but also provide different characteristics for a variety of applications. So, an efficient image encryption method should be developed according to the characteristics of the compression technique itself. JPEG 2000 is an emerging standard for still image compression. JPEG 2000 provides various functionalities to solve the

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Chen, IChien, and 陳怡蒨. "JPEG-Based Moment Computations." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/84349415593594808215.

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碩士<br>國立臺灣科技大學<br>資訊管理系<br>89<br>Computing moments is important in image processing field. Especially the low--order moments are used widely in many practical applications. In this paper, we present an efficient algorithm for computing moments in the JPEG--compressed domain directly without the need to decompress the JPEG--compressed image. Experimental results reveal that the execution time improvement is about $98.8\%$ when compared to the indirect method by decompressing the JPEG--encoded image first, then applying the conventional moment--computation algorithm on the original image. In ad

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Ondruš, Jan. "Bezztrátová komprese JPEG grafiky." Master's thesis, 2009. http://www.nusl.cz/ntk/nusl-286256.

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JPEG is a commonly used method of compression for photographic images. It consists of lossy and lossless part. Static Huffman coding is a last step. We can replace this step using advanced techniques and arithmetic coding. In this work we introduce method used for additional compression JPEG files (files in JFIF format) saved in baseline mode. Partial decompression is a general way we can use in this case. We invert only last lossless steps of JPEG compression algorithm. Compressed file is transformed into array of quantized DCT coefficients. We designed algorithm for prediction of the DCT coe

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劉姵菱. "JPEG-Based Steganographic Algorithms." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/59601611431232686953.

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碩士<br>國立清華大學<br>資訊工程學系<br>100<br>Steganography is a method of data hiding. It is more and more important while the Internet communication grows up. Now, many steganographic algorithms or software have already been developed including image hiding techniques for JPEG images. JPEG is the most common image format used by digital cameras and transmitted in the Internet. This thesis proposes two methods to increase the capacity of F5 embedding algorithm. The first method is a pre-processing method, we randomly modifies the qDCT coefficients before the F5 embedding algorithm to get more nonzero

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Dwivedi, Harsh Vardhan. "Design of JPEG Compressor." Thesis, 2009. http://ethesis.nitrkl.ac.in/1090/1/Thesis.pdf.

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Images are generated, edited and transmitted on a very regular basis in a vast number of systems today. The raw image data generated by the sensors on a camera is very voluminous to store and hence not very efficient. It becomes especially cumbersome to move it around in bandwidth constrained systems or where bandwidth is to be conserved for cost purposes such as the World Wide Web. Such scenarios demand use of efficient image compressing techniques such as the JPEG algorithm technique which compresses the image to a high degree with little loss in perceived quality of the image. Today JPEG al

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Lian, Chung-Jr, and 連崇志. "Design and Implementation of Image Coding Systems: JPEG, JPEG 2000 and MPEG-4 VTC." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/77902516298772727288.

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博士<br>國立臺灣大學<br>電機工程學研究所<br>91<br>In this dissertation, the hardware architecture design and implementation of image coding systems are presented. The research focuses on three image coding standards: JPEG, JPEG2000, and MPEG-4 Visual Texture Coding (VTC). JPEG is a well-known and matured standard. It has been widely used for natural image compression, especially very popular for digital still camera applications. In the first part of this dissertation, we proposed fully pipelined JPEG encoder and decoder for high speed image pr

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Chen, Yi-Lei, and 陳以雷. "Tampering Detection in JPEG Images." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/43195323821600534654.

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碩士<br>國立清華大學<br>資訊工程學系<br>97<br>Since JPEG has been a popularly used image compression standard, tampering detection in JPEG images now plays an important role. Tampering on compressed images often involve recompression and tend to erase those tampering traces existed in uncompressed images. We could, however, try to discover new traces caused by recompression and use these traces to detect the recompression tampering. The artifacts introduced by lossy JPEG compression can be seen as an inherent signature for recompressed images. In this thesis, we first propose a robust tampered image detecti

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Lee, Jung-Chieh, and 李榮杰. "JPEG image compression chip design." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/96388169020307901202.

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碩士<br>國立暨南國際大學<br>電機工程學系<br>93<br>Today we can access the real-time video news by the cell phone. When we walk down the street there is a camera mechinge, lovers or friends like to go in and take a funny picture. The digital application is ubiquity and more and more million-pixel digital cameras appear in the markets. Howerer, it take a lot of storage space and transmission bandwidth to maintain the high resolution and high quality images. Hence decreasing the amount of data is a very important topic. JPEG is a widely used still image compression and matured standard, we choice it to solve the

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Chen, Yung-Chen, and 陳詠哲. "Wavelet-Based JPEG 2000 Image Compression." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/66542893741935624689.

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Lopata, Jan. "Odstraňování artefaktů JPEG komprese obrazových dat." Master's thesis, 2014. http://www.nusl.cz/ntk/nusl-341236.

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This thesis is concerned with the removal of artefacts typical for JPEG im- age compression. First, we describe the mathematical formulation of the JPEG format and the problem of artefact removal. We then formulate the problem as an optimization problem, where the minimized functional is obtained via Bayes' theorem and complex wavelets. We describe proximal operators and algorithms and apply them to the minimization of the given functional. The final algorithm is implemented in MATLAB and tested on several test problems. 1

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Thanh, V. T. Kieu(Vien Tat Kieu). "Post-processing of JPEG decompressed images." Thesis, 2002. https://eprints.utas.edu.au/22088/1/whole_ThanhVienTatKieu2002_thesis.pdf.

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Tsai, Chi-Shien, and 蔡繼賢. "Image Quality Improvement for JPEG Images." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/07438556114344329220.

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碩士<br>淡江大學<br>資訊工程學系資訊網路與通訊碩士班<br>101<br>In this paper we proposed a method to enhance the quality of the decompressed JPEG images, which is an improved version of the method proposed by Chang et.al.. A so-called Modified Coefficient Adjustment Block is used to record the round off situation while DCT coefficients in a block are quantized according to a given quantization block. In the decompression stage, the information recorded in the Modified Coefficient Adjustment Block is then referred to adjust the de-quantized DCT coefficients before the Inverse DCT transformation. We provide two choic

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Jiun-HauJang and 張駿豪. "Hardware Design for JPEG Image Decoder." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/15216442530660602971.

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碩士<br>國立成功大學<br>電機工程學系碩博士班<br>101<br>In this paper, we propose hardware design for JPEG image decoder. The design process of decoder is handled JPEG header file. Then it handled variable length decoding and inverse quantization. We use inverse zig-zag scan rearrange the data, and use the two-dimensional inverse discrete cosine transform the data from the frequency domain values back to the apace domain values. Finally, it transformed YCbCr coordinate values into RGB coordinate values. The foregoing are completed by hardware description languages (Verilog). JPEG read file, and the data of RGB a

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Lo, Zhi-Yao, and 羅子堯. "Securing JPEG Architecture Based on Switching Chaos." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/77569658525601132313.

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碩士<br>國立宜蘭大學<br>電子工程學系碩士班<br>104<br>Chaotic system has the high sensitivity to initial conditions and excellent random behaviors. It can be applied to cryptosystem. The computation of low-dimensional chaotic systems is fast, but there are some concerns on their security for the simple system parameters. The high-dimensional chaotic systems are more secure, but have more complex parameters that lead to high computation complexity. The switching chaotic system is introduced by adopting multiple low-dimensional chaotic systems, to promote the security of the system and the difficulties of attacke

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LO, Shun-Teng, and 羅順騰. "Blocking Noise Suppression Schemes for JPEG Images." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/77855472324138344824.

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碩士<br>國立交通大學<br>電機與控制工程系<br>90<br>The image compression by JPEG is very common in our daily life, for example, Internet or the digital camera. JPEG, itself, is a standard of image compression to decrease the data rate. Unfortunately, annoying blocking artifacts would appear. The blocking noise makes us uncomfortable usually. It is necessary and important to remove the blocking noises. The thesis introduces several schemes for the JPEG blocking noise removal: the noise discussed here is the blocking noise resulted from the quantization of DCT coefficients. Traditionally, different filters are a

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Hsu, Shou-Hua, and 許修華. "Error Isolation Progressive JPEG over Wireless Communication." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/75498753504065489826.

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碩士<br>國立中央大學<br>電機工程學系<br>86<br>With the development of mobile communication, data transmissionover wireless channels is getting more popular recently. We face two problems in wireless communication, limited bandwidth and high error rates. When using progressive coding, the decoder can decide where to stop receiving data to save bandwidth. In this thesis, we focus on the progressive mode in JPEG image compression standard over relatively high error rate channels. We utilize synchronization

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Xu, Xiu-Hua, and 許修華. "Error Isolation Progressive JPEG over Wireless Communication." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/70434434214941235497.

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Shen, Chih-yi, and 沈志益. "A Secure Steganographic Technique for JPEG Images." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/96089069159659958717.

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碩士<br>逢甲大學<br>通訊工程所<br>94<br>Image steganography, which differs from cryptography that directly encrypts the data transmitted, embeds important messages into a digital image that appears usual before transmission to improve the concealment of communication. Its security depends on the ability to bypass the awareness of others and to resist the detection of secret messages. Steganalysis is the art of detecting acts of secret communication. The JPEG image format is currently the most widely used storage format in the Internet. JPEG image steganography applies the JPEG format as the cover image,

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Wu, Bing-Ze, and 吳秉澤. "A Tamper Detection Scheme for JPEG Images." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/24884799067982841065.

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碩士<br>大同大學<br>資訊工程學系(所)<br>98<br>This paper presents a tamper detection scheme that can locate the tampered areas in JPEG images. Unlike other schemes that deal with uncompressed images, the presented scheme accepts JPEG image as input. The presented scheme calculates the difference values as the watermark from the host JPEG image and embeds the watermark into the DCT frequency domain of the image. When there is a JPEG image that needs to be verified, the scheme compares the watermark to detect the tampered areas. The experimental result shows the scheme can effectively detect the tampered are

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LIN, NEIN-HSIEN, and 林念賢. "A Jpeg-2000-Based Deforming Mesh Streaming." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/25369764370956605840.

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碩士<br>國立臺灣大學<br>資訊網路與多媒體研究所<br>95<br>For PC and even mobile device, video and image streaming technologies, such as H.264 and JPEG/JPEG 2000, are already mature. However, the streaming technology for 3D model or so-called mesh data is still far from practical use. Therefore, in this paper, we propose a mesh streaming method based on JPEG 2000 standard and integrate it into an existed multimedia streaming server, so that our mesh streaming method can directly benefit from current image and video streaming technologies. In this method, the mesh data of a 3D model is first converted into a JPEG 2

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Jiang, Wan-Shang, and 江萬晟. "Hardwar/Software Codesign of an JPEG Decoder." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/58679345676521432485.

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碩士<br>國立海洋大學<br>電機工程學系<br>89<br>The development process for consumer-electronics products is often characterized by relatively short time-to-market, because of intensive competition. An efficient development process is, therefore, crucial to the successful introduction of such a product into the marketplace. Hardware/software codesign is a development methodology which involves proper partitioning and scheduling of the hardware and software parts within a system. Through well-defined communication interfaces, the hardware and software modules can be designed, simulated, and verified in paralle

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In, Jaehan. "Rd optimized progressive image coding using JPEG." Thesis, 1998. http://hdl.handle.net/2429/7921.

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The JPEG standard allows four modes of operation. They are the hierarchical (HJPEG), progressive (PJPEG), sequential (SJPEG), and lossless modes1: The HJPEG and PJPEG modes inherently support progressive image coding. In HJPEG, an image is decomposed into subimages of different resolution, each of which is then coded using one of the other three modes of JPEG. Progressiveness within a resolution in HJPEG can be achieved when each subimage is coded using PJPEG. An image coded using PJPEG consists of scans, each of which contributes to a portion of the reconstructed image quality. While S

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Hu, Guang-nan, and 胡光南. "Fast downsizing transcoder for JPEG 2000 images." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/64887184539077129199.

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碩士<br>南華大學<br>資訊管理學研究所<br>96<br>This paper presents a fast downsizing method for JPEG 2000 images. The proposed method is used to downsize the JPEG 2000 images under frequency domain. Compared with the traditional method, which downsizes the JPEG 2000 images under spatial domain, our proposed method can effectivelyreduce both required memory space and execution time. Experimental results reveal that the proposed frequency domain downsizing method can reduce the average execution time of the spatial domain downsizing method by 6% to 73% for images are downscaled to 1/2n×1/2n of the original ima

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Chih-chen, Chiang, and 江至晨. "Optimnu JPEG Watermarking Based on Genetic Algorithms." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/62374334771209270590.

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碩士<br>長榮大學<br>經營管理研究所<br>93<br>With the rapid growth of the Internet, Multimedia, and E-Commerce, it becomes more convenient and fast for the users to interchange the information. However, the image files are extremely huge, it is necessary to use the compression technology to reduce the file space. Digital watermarking is one of commonly used techniques to hide information in images to protect copyright. To increase the application of watermarking area, the two techniques, digital watermarking and high image compression standard of JPEG, will be integrated in the thesis. In the processing of

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