Дисертації з теми "Video transformation"
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Baba, Gar Yusuf. "The Metamorphosis of Performance: Oral Heritage and Medial Transformation in Kanywood Video Films." Doctoral thesis, Humboldt-Universität zu Berlin, 2020. http://dx.doi.org/10.18452/21532.
Повний текст джерелаThe study identifies and critically analyses Kanywood video films with particular emphasis on sources in oral literature and performance practices. By way of definition, Kanywood stands for both the film industry and video films produced in northern Nigeria. The study sticks to “Kanywood” as the label coined for the industry. However, “Kannywood” with the consonant cluster, as in Hollywood, Bollywood and Nollywood is a variant label, which some scholars have adopted. The study forgrounds that Kanywood filmmakers' appropriation of Bollywood have been excessively explored. But investigations in the area of re-enactment of performance in Kanywood video films are conceivably insufficiently undertaken. Therefore, the distinct contribution of this study reflects on transformation of Hausa culture due to globalization, thus elaborating the existing works on Kanywood. Through a performance framework and a thorough analysis of selected corpus, the study shows how video film is seen as a provider of major social and cultural changes. It is not only a means through which an exploration of the concept of the transcending globalization is possible, but it is also a way of comprehending how the society transforms under some changing circumstances. While the general underlying question is whether or not culture is static, the study thereby negotiates specific questions such as how are performances re-enacted and re-framed during filmmaking process, and how far are traditionally encoded performance events altered, changed, subverted or enriched in video film? The study recommends the aesthetics of language as an area of further research, foregrounds that imitation, adaptation and appropriation of circulating artistic forms is a global phenomenon grounded in intertextuality, expounds that culture is not fixed but dynamic, and concludes that it is more appropriate to look at the video films and the filmmakers through the paradigm of cultural hybridity and modernization which enhance cultural shift, transformation and change in this era of globalization. Keywords: Kanywood, performance, oral heritage, transformation The study identifies and critically analyses Kanywood video films with particular emphasis on sources in oral literature and performance practices. By way of definition, Kanywood stands for both the film industry and video films produced in northern Nigeria. The study sticks to “Kanywood” as the label coined for the industry. However, “Kannywood” with the consonant cluster, as in Hollywood, Bollywood and Nollywood is a variant label, which some scholars have adopted. The study forgrounds that Kanywood filmmakers' appropriation of Bollywood have been excessively explored. But investigations in the area of re-enactment of performance in Kanywood video films are conceivably insufficiently undertaken. Therefore, the distinct contribution of this study reflects on transformation of Hausa culture due to globalization, thus elaborating the existing works on Kanywood. Through a performance framework and a thorough analysis of selected corpus, the study shows how video film is seen as a provider of major social and cultural changes. It is not only a means through which an exploration of the concept of the transcending globalization is possible, but it is also a way of comprehending how the society transforms under some changing circumstances. While the general underlying question is whether or not culture is static, the study thereby negotiates specific questions such as how are performances re-enacted and re-framed during filmmaking process, and how far are traditionally encoded performance events altered, changed, subverted or enriched in video film? The study recommends the aesthetics of language as an area of further research, foregrounds that imitation, adaptation and appropriation of circulating artistic forms is a global phenomenon grounded in intertextuality, expounds that culture is not fixed but dynamic, and concludes that it is more appropriate to look at the video films and the filmmakers through the paradigm of cultural hybridity and modernization which enhance cultural shift, transformation and change in this era of globalization. Keywords: Kanywood, performance, oral heritage, transformation The study identifies and critically analyses Kanywood Video films with particular emphasis on sources in oral literature and performance practices. By way of definition, Kanywood stands for both the film industry and video films produced in northern Nigeria. The study sticks to "Kanywood" as the label coined for the industry. However, "Kannywood" with the consonant cluster, as in Hollywood, Bollywood and Nollywood is a variant label, which some scholars have adopted. The study foregrounds that Kanywood filmmakers' appropriation of Bollywood have been excessively explored. But investigations in the area of re-enactment of performance in Kanywood video films are conceivably insufficiently undertaken. Therefore, the distinct contribution of this reflects on transformation of Hausa culture due to globalization, thus elaborating the existing works on Kanywood. Through a performance framework and a thorough analysis of selected corpus, the study shows how video film is seen as a provider of major social and cultural changes. It is not only a means through which an exploration of the concept of the transcending globalization is possible, but it is also a way of comprehending how the society transforms under some changing circumstances. While the general underlying question is whether or not culture is static, the study thereby negotiates specific questions such as how are performances re-enacted and re-framed during filmmaking process, and how far are traditionally encoded performance events altered, changed, subverted or enriched in video film? The study recommends the aesthetics of language as an area of further research, foregrounds that imitation, adaptation and appropriation of circulating artistic forms is a global phenomenon grounded in intertextuality, expounds that culture is not fixed but dynamic, and concludes that it is more appropriate to look at the video films and the filmmakers through the paradigm of cultural hybridity and modernization which enhance cultural shift, transformation and change in this era of globalization.
Halbach, Till. "Error-robust coding and transformation of compressed hybered hybrid video streams for packet-switched wireless networks." Doctoral thesis, Norwegian University of Science and Technology, Faculty of Information Technology, Mathematics and Electrical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-136.
Повний текст джерелаThis dissertation considers packet-switched wireless networks for transmission of variable-rate layered hybrid video streams. Target applications are video streaming and broadcasting services. The work can be divided into two main parts.
In the first part, a novel quality-scalable scheme based on coefficient refinement and encoder quality constraints is developed as a possible extension to the video coding standard H.264. After a technical introduction to the coding tools of H.264 with the main focus on error resilience features, various quality scalability schemes in previous research are reviewed. Based on this discussion, an encoder decoder framework is designed for an arbitrary number of quality layers, hereby also enabling region-of-interest coding. After that, the performance of the new system is exhaustively tested, showing that the bit rate increase typically encountered with scalable hybrid coding schemes is, for certain coding parameters, only small to moderate. The double- and triple-layer constellations of the framework are shown to perform superior to other systems.
The second part considers layered code streams as generated by the scheme of the first part. Various error propagation issues in hybrid streams are discussed, which leads to the definition of a decoder quality constraint and a segmentation of the code stream to transmit. A packetization scheme based on successive source rate consumption is drafted, followed by the formulation of the channel code rate optimization problem for an optimum assignment of available codes to the channel packets. Proper MSE-based error metrics are derived, incorporating the properties of the source signal, a terminate-on-error decoding strategy, error concealment, inter-packet dependencies, and the channel conditions. The Viterbi algorithm is presented as a low-complexity solution to the optimization problem, showing a great adaptivity of the joint source channel coding scheme to the channel conditions. An almost constant image qualiity is achieved, also in mismatch situations, while the overall channel code rate decreases only as little as necessary as the channel quality deteriorates. It is further shown that the variance of code distributions is only small, and that the codes are assigned irregularly to all channel packets.
A double-layer constellation of the framework clearly outperforms other schemes with a substantial margin.
Keywords — Digital lossy video compression, visual communication, variable bit rate (VBR), SNR scalability, layered image processing, quality layer, hybrid code stream, predictive coding, progressive bit stream, joint source channel coding, fidelity constraint, channel error robustness, resilience, concealment, packet-switched, mobile and wireless ATM, noisy transmission, packet loss, binary symmetric channel, streaming, broadcasting, satellite and radio links, H.264, MPEG-4 AVC, Viterbi, trellis, unequal error protection
Mai, Thi Xuan Huong <1988>. "Digital transformation – The movements of marketing and consumer behaviors towards digital platforms – Video streaming use case." Master's Degree Thesis, Università Ca' Foscari Venezia, 2022. http://hdl.handle.net/10579/21689.
Повний текст джерелаLindmäe, Maria. "Reimagining the city: hip hop and the social transformation of Comuna 13, Medellín." Doctoral thesis, Universitat Pompeu Fabra, 2020. http://hdl.handle.net/10803/668921.
Повний текст джерелаLa presente tesis estudia el papel de la práctica musical en la construcción social de la ciudad desde el paradigma de la economía de la experiencia. La práctica musical, entendida como la organización colectiva sonido que requiere tomar decisiones sobre lo que se emite o lo que no, y sobre lo que crea armonía o lo que produce disonancia, también organiza el espacio imaginario y real donde esa música se crea. Destacando al hip hop como un proceso social que constituye y a su vez está constituido por espacios intermedios diferenciales, la tesis pone en valor las prácticas de creatividad vernácula, analizando su función en la reconstrucción social de la Comuna 13 de Medellín, Colombia. La investigación, centrada en el patrimonio cultural creado por jóvenes artistas como un medio de resistencia a la violencia (estatal), sostiene que las formaciones urbano-sociales, como los grupos de hip-hop, tienen una repercusión importante en el empoderamiento de la juventud y en la creación de narrativas de lugar alternativas al imaginario elitista de la ciudad.
Čermák, Marek. "Detekce optického disku v sériích snímků z video oftalmoskopu." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-316826.
Повний текст джерелаGrimm, Martial. "Proposition d'une nouvelle méthode de transformation de signaux video rvb/hsi : application aux systèmes de vision couleur temps réel." Nancy 1, 1994. http://docnum.univ-lorraine.fr/public/SCD_T_1994_0322_GRIMM.pdf.
Повний текст джерелаKabusheva, Sabina. "Transformation of Telco business strategy driven by over-the-top services such as WhatsApp, Skype and Netflix: The case of the Czech Republic." Master's thesis, Vysoká škola ekonomická v Praze, 2015. http://www.nusl.cz/ntk/nusl-206054.
Повний текст джерелаMehta, Smith. "The 'new screen ecology' in India: A study in digital transformation of media." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/208077/1/Smith_Mehta_Thesis.pdf.
Повний текст джерелаPALLONE, Grégory. "DILATATION ET TRANSPOSITION SOUS CONTRAINTES PERCEPTIVES DES SIGNAUX AUDIO : APPLICATION AU TRANSFERT CINEMA-VIDEO." Phd thesis, Université de la Méditerranée - Aix-Marseille II, 2003. http://tel.archives-ouvertes.fr/tel-00003363.
Повний текст джерела25 images/s, implique l'accélération ou le ralentissement de la
bande-son lors du transfert d'un format vers l'autre. Ceci
provoque une modification temporelle du signal sonore, et par
conséquent une modification spectrale avec altération du timbre.
Les studios de post-production audiovisuelle souhaitent compenser
cet effet par l'application d'une transformation sonore adéquate.
L'objectif de ce travail est de fournir à l'industrie
audiovisuelle un système permettant de pallier la modification de
timbre engendrée par le changement de vitesse de lecture. Ce
système se compose d'une part d'un algorithme de traitement et
d'autre part d'une machine sur lequel il est implanté.
L'algorithme est conçu et développé pour répondre aux contraintes
liées à la qualité sonore et à la compatibilité multicanal. La
machine, baptisée HARMO, est conçue spécifiquement par la société
GENESIS sur la base de processeurs de signaux numériques, et doit
répondre à la contrainte de temps-réel. Cet aspect "valorisation"
conduit à intégrer dans le projet les contraintes de coût et de
délai de réalisation.
Un état de l'art basé sur une bibliographie quasi-exhaustive
aboutit à une classification originale des méthodes de dilatation
et de transposition existantes. Ceci nous amène à distinguer et à
étudier les méthodes classiques temporelles et fréquentielles, et
à introduire les méthodes temps-fréquence. Cette classification
est à la base de plusieurs méthodes innovantes :
1. deux méthodes temps-fréquence dont l'analyse est adaptée à l'audition,
2. deux méthodes couplées qui associent les avantages des méthodes temporelles et fréquentielles,
3. une méthode temporelle basée sur une amélioration des méthodes existantes.
Les algorithmes sont évalués grâce à une banque de sons-test
spécifiquement élaborée pour mettre en évidence les défauts
caractéristiques des algorithmes. Notre choix final s'est porté
sur l'approche temporelle, que nous optimisons par l'adjonction de
critères de segmentation basés sur l'autocorrélation normalisée et
la détection de transitoires. Cet algorithme s'intègre dans un
logiciel qui a été structuré pour un fonctionnement temps-réel et
multicanal sur le système HARMO.
Hyatt, Jonathan Charles. "The Criterion of Quality: A Paratextual Analysis of the Criterion Collection in the Age of Digital Distribution." Chapman University Digital Commons, 2014. https://digitalcommons.chapman.edu/film_studies_theses/1.
Повний текст джерелаVadkerti, Kristián. "Optické metody měření kontrakce izolované srdeční buňky." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218725.
Повний текст джерелаBanda, Dalitso Hansini. "Deep video-to-video transformations for accessibility applications." Thesis, Massachusetts Institute of Technology, 2018. https://hdl.handle.net/1721.1/121622.
Повний текст джерелаThesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2018
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 73-79).
We develop a class of visual assistive technologies that can learn visual transforms to improve accessibility as an alternative to traditional methods that mostly rely on extracted symbolic information. In this thesis, we mainly focus on how we can apply this class of systems to address photosensitivity. People with photosensitivity may have seizures, migraines or other adverse reactions to certain visual stimuli such as flashing images and alternating patterns. We develop deep learning models that learn to identify and transform video sequences containing such stimuli whilst preserving video quality and content. Using descriptions of the adverse visual stimuli, we train models to learn transforms to remove such stimuli. We show that these deep learning models are able to generalize to real-world examples of images with these problematic stimuli. From our experimental trials, human subjects rated video sequences transformed by our models as having significantly less problematic stimuli than their input. We extend these ideas; we show how these deep transformation networks can be applied in other visual assistive domains through demonstration of an application addressing the problem of emotion recognition in those with the Autism Spectrum Disorder.
by Dalitso Hansini Banda.
M. Eng.
M.Eng. Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science
Fleck, Rika. "Erklärvideos zur Wissensvermittlung im Hochschulkontext: ein Praxisbeispiel im fächerübergreifenden Austausch." TUDpress, 2019. https://tud.qucosa.de/id/qucosa%3A36569.
Повний текст джерелаSu, Jonathan K. "Adaptive rate-constrained transform video coding." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/13364.
Повний текст джерелаDugnolle, Patrick. "Outils mathématiques appliqués à l'analyse stoechiométrique d'une séquence vidéo-microscopique de cicatrisation in vitro en contraste de phase." Université Joseph Fourier (Grenoble), 2000. http://www.theses.fr/2000GRE10031.
Повний текст джерелаDusong, Emma. "Chanter les transformations : voix, performance, vidéo, film." Amiens, 2011. http://www.theses.fr/2011AMIE0020.
Повний текст джерелаTo sing is to favour a dialogue with the world. One must take a breath to produce a vocal sound- this connects the action of singing to the action of living. Emphasizing the verb to live/ to sing (rather than the noun life/ song) underscores an action that pulsates at the heart of contemporary art and examines the adoption of a practice usually restricted to the musical field. The exhibition space commits new modes of reception: voices rise to accompany transitions and difficulties. From birth to death, from childhood to adulthood, one sings in videos, sound pieces, films. . . . Singing keeps one company during periods of vulnerability. At the core of the voice, artists play and thwart expectations and undertake transformations. This thesis is based on personal practice, giving the leading role to the works describred and studied from the perspective of singing
Tall, Gay. "Conception et réalisation d'une architecture spécialisée pour la transformation de Fourier bidimensionnelle en temps réel vidéo." Rouen, 1993. http://www.theses.fr/1993ROUES060.
Повний текст джерелаPapadopoulos, Constantinos A. "The use of geometric transformations for motion compensation in video data compression." Thesis, King's College London (University of London), 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.264923.
Повний текст джерелаMacy, Michelle. "Technology Use as Transformative Pedagogy: Using Video Editing Technology to Learn About Teaching." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/3227.
Повний текст джерелаBreimyer, Paul. "The Fast Fourier Transform in the MPEG encoding algorithm." Diss., Connect to the thesis, 2001. http://hdl.handle.net/10066/1488.
Повний текст джерелаIracane, Daniel. "Etude des condensats de gluons au moyen d'une transformation de bogoliubov." Paris 11, 1985. http://www.theses.fr/1985PA112162.
Повний текст джерелаWe describe the ground state of non-perturbative QCD as a gluon condensate. In the framework of the Coulomb gauge hamiltonian, we introduce an effective interaction between infrared gluons by removing high-momentum gluons. The Bogoliubov transformation provides us with our variational space. The minimisation over this Fock subspace leads to a non-perturbative vacuum and its excitations. The minimum functional space for a boson dynamic is a distribution set. We find two kinds of condensation. The first one occurs only for zero-momentum states and looks like the Bose Condensation. In the second one, the quasiparticle spectrum shows a finite gap and the vacuum is a supraconducting state. We give constraints on the interaction so that the supraconducting phase is more bounded than the Bose one
Pospíšil, Petr. "Knihovna pro efektivní záznam videa v 3D aplikaci." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2012. http://www.nusl.cz/ntk/nusl-236587.
Повний текст джерелаBrandner, Vera Rosamaria [Verfasser], and Ulli [Akademischer Betreuer] Vilsmaier. "Die Bilder der Anderen erforschen. Generative Bildarbeit: Das transformative Potential fotografischer Praxis in Situationen kultureller Differenz / Vera Rosamaria Brandner ; Betreuer: Ulli Vilsmaier." Lüneburg : Universitätsbibliothek der Leuphana Universität Lüneburg, 2018. http://d-nb.info/1160442053/34.
Повний текст джерелаMoubtahij, Redouane El. "Transformations polynomiales, applications à l'estimation de mouvements et la classification." Thesis, Poitiers, 2016. http://www.theses.fr/2016POIT2268/document.
Повний текст джерелаThe research relies on modeling the dynamic functional information from the fields of apparent movement using basic orthogonal polynomials. The goal is to model the movement and texture extracted for automatic analysis and recognition of images and videos. We are interested both in human movements as dynamic textures. Orthogonal polynomials bases were studied. This approach is particularly interesting because it offers a multi-resolution and a multi-scale decomposition. The first contribution of this thesis is the definition of method of image spatial decomposition: the image is projected and partially rebuilt with an appropriate choice of the degree of anisotropy associated with the decomposition equation based on polynomial transformations. This spatial approach is extended into three dimensions to retrieve the dynamic texture in videos. Our second contribution is to use image sequences that represent the geometric parts as initial images to extract color optical flow. Two descriptors of action, spatial and space-time, based on the combination of information of motion / texture are extracted. It is thus possible to define a system to recognize a complex action (composed of a series of fields of motion and polynomial texture) in a video
Puri, Saurabh. "Learning, selection and coding of new block transforms in and for the optimization loop of video coders." Thesis, Nantes, 2017. http://www.theses.fr/2017NANT4075/document.
Повний текст джерелаTransforms are a key element in block-based video coding systems which, in conjugation with quantization, is important for the overall compression efficiency of the system. This thesis explores multipletransform- based learning schemes. A first contribution of this work is dedicated to the evaluation of transform learning schemes with two flavors 1) online learning, and 2) offline learning. The two approaches are compared against each other and their respective appropriability is studied in detail. Some novel techniques are proposed in this work to 1) improve the stability of the learning scheme and 2) to reduce the signaling cost. In a second contribution of this thesis, the offline multiple-transform learning schemes already known in the literature are further extended with the aims to altogether 1) provide more generic transforms that are less biased towards specific classes of contents, 2) achieve higher compression gains, 3) reduce encoding and decoding computational complexity. An improved Mode Dependent Transform Competition (IMDTC) scheme is proposed which provides a considerable gain of over 5% compared to standard HEVC under All Intra (AI) configuration at a complexity just 2.9 times the standard HEVC. Finally, the content adaptability aspect of the offline learning is explored through a novel content-adapted pool-based transform learning approach where several multiple-transform sets are learned on different contents and pooled together. During the coding of a given region of an image, one transform set is selected locally from the pool. Numerical results show the high potential of this approach against the conservative online and offline approaches
Timoumi, Souad. "Transformation physiques et chimiques de l’azithromycine au cours du séchage par contact en lit agité et sous vide." Lyon 1, 2008. http://www.theses.fr/2008LYO10147.
Повний текст джерелаThe two main objectives of this word were : 1) the experimental study of the effect of hygro-thermal conditions variation on the physical stability and the thermophysical properties of azithromycin ; 2) the determination of the drying operating conditions that provide the best compromise between the chemical purity of the product and the processing time by means of an experimental design. As concerns the first goal, the density, the heat capacity, the heat conductivity, the solubility and the desorption isotherms of the commercial azithromycin, were determined for a start. Then, the samples heated at 50°C and 80°C were analysed by PLM, DSC, TGA and WRPD techniques and the data were compared to that of the original sample. According to these data, the original azithromycin was a stable dehydrate which converted by isomorphic dehydration (the crystalline lattice remained unchanged) to a very hygroscopic anhydrate when heated up to 80° C. As concerns the second goal, drying trials were realised by means of laboratory equipment according to a second order experimental design. The operating parameters were the heating wall temperature, the vessel total pressure and the rotational speed of the stirrer. The responses of our experimental plan were the total impurity content and the specific contents of impurities A and B. According to our results, the highest temperatures and lowest pressures corresponded, on one hand, to the lowest drying times, but, on the other hand, to the highest impurities contents. The generation of impurity A was evidently activated by temperature. Finally, a global operating optimum was determined by targeting the maximum tolerated impurities contents and by minimizing the drying time
Booth, Sarah. "Les états de transformation dans une installation à partir de la matrice-tableau." Master's thesis, Université Laval, 2016. http://hdl.handle.net/20.500.11794/26867.
Повний текст джерелаBertling, Wiik Siri. "Whispering Bodies : The Textual Brain." Thesis, Stockholms konstnärliga högskola, Institutionen för scenkonst, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uniarts:diva-939.
Повний текст джерелаBenzerzour, Mohamed. "Transformations urbaines et variations du microclimat : application au centre ancien de Nantes et proposition d'un indicateur "morpho-climatique"." Phd thesis, Université de Nantes, 2004. http://tel.archives-ouvertes.fr/tel-00428536.
Повний текст джерелаRimbaud, Christian. "Contribution aux mesures physiques utilisant une source modulée de rayonnement appliquée aux installations nucléaires." Grenoble 1, 1987. http://www.theses.fr/1987GRE10005.
Повний текст джерелаGao, FengFeng. "Quand le cinéma entre dans Montagnes-Eaux (Shan Shui) : Recherche sur la mise en oeuvre de la pensée chinoise de la nature dans le cinéma de Hou Hsiao-hsien." Sorbonne Paris Cité, 2015. http://www.theses.fr/2015USPCC295.
Повний текст джерелаThis research on the report between the narrative of the cinema of Hou Hsiao-hsien and the traditional Chinese thought has for am¬bition to aim at bringing another point de view on the construction of the cinematic narrative appropriate to Hou Hsiao-hsien whose culture lies outside the western codes, the origin of cinema. Using the film means, Hou Hsiao-hsien preserved a perception appro¬priate to the Chinese culture, which thinks the world not in terms of " being ", but " breath-energy". He creates, as would a traditio¬nal Chinese painter, infusing his works sensitivity of his own, be¬cause of his real-life experience, from his origins. For the " reading " of the cinema of Hou Hsiao-hsien, it is inevitably to return to the source, which builds the Chinese traditional artistic spirit — the nature - like the " Tao " that engender all things, but does not appro¬priate them, the nature implies a situation without forcing, which depends on nothing. It is not involved, but is in accordance with all the things by letting corne what cornes from oneself. Cinema of Hou Hsiao-hsien inherits from the nature represented in painting, and transposes it in the film domain with the representation in the content, the structure and the style: the relationship between inside and outside of the plan, the movement of camera, the construction of the filmic space, the coordination of sound and the image, etc. This research tries to analyse the elements and codes, which show the nature, to interpret the ways of this demonstration. The me¬thod applied in the research is one detailed analyses of the films of Hou Hsiao-hsien, the ideas exposed in the Chinese thought on the nature, in order to determine the way the thought of the nature expressed in the cinema of Hou Hsiao-hsien, and to explain the reasons why he is the heir and how he uses these ideas to create his own world
Candelier, Kévin. "Caractérisation des transformations physico-chimiques intervenant lors de la thermodégradation du bois. Influence de l'intensité de traitement, de l'essence et de l'atmosphère." Thesis, Université de Lorraine, 2013. http://www.theses.fr/2013LORR0166/document.
Повний текст джерелаThermal treatment is based on biopolymer chemical degradation by heat transfer, without additional chemical products impregnation. This process improves the dimensional stability and the decay resistance of wood. These improvements come at the expense of wood mechanical properties of wood which weak. Several types of heating processes exist currently differing mainly by the nature of the inert atmosphere used during treatment. The durability of this new wood material is correlated to the degree of polymers thermal degradation depending on the conditions and the treatment intensity. A conducting heat treatment pilot using nitrogen or vacuum and allowing dynamic record of mass loss is used to understand better the atmosphere influence. The results show that utilization of vacuum permit the elimination of volatile products formed during heat treatment and accumulated in oven, leading to lower extractives and Klason lignin contents due to the non recondensation of thermal degradation products. Limitation of the formation of recondensation products generates a lower mass loss for same treatment intensity and explains the lower polysaccharides degradation during a vacuum process. Fine chemical analyses and the study about thermal degradation reaction kinetics have allowed confirming the higher sensibility of hardwood than softwood to thermal degradation. In addition, these analyses have permitted the volatile thermal degradation products identification related to the treatment intensity. Subsequently, results have shown a higher thermal sensibility of lignin than holocelluloses for temperatures below 230°C. This work is a significant increase in basic knowledge about the mechanisms of wood thermal degradation and their relations with the processing parameters
Chen, Ken-Min, and 陳耿民. "Video Search Using Video Clips and Color String Transformation Analysis." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/23306765813545081954.
Повний текст джерела國立臺北大學
通訊工程研究所
103
Large volume video analytics is a commonly discussed topic in the current digital age. Each industry has its own type of video data, and analyzing these video data is regarded as an essential procedure for detecting the relevant impact factors. Currently, Large volume video analytics involves various problems, such as problems in the pattern of video data and search performance. Addressing these problems is not only an industrial development requirement but also a relevant topic for academic research. This paper presents a rapid and accurate method for associative searching in big image data from security monitoring. The Full-Text searching method, which is now an entirely developed technique, searches the relevant image information in a massive image database. In addition, this paper proposes Color to String Transformation Analysis (CoSTA) for transforming a color feature into a text string of a continuous image object. Moreover, to help users find appropriate information from a large volume video database quickly and automatically, this video searching system provides a user interface for accelerating the search time.
Chang, Rong-Jie, and 張榮傑. "Video Style Transformation Based on Semantic Segmentation." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/xf4n7f.
Повний текст джерела國立交通大學
多媒體工程研究所
106
Most applications about artistic style transfer for videos, which based on deep learning, only extract features from a single style image to do texture synthesis. Even if they use two style images, the results still blend without rules. This design preserves the style to be identical in the whole video, but it loses the creativity and selectivity for users. Therefore, in this thesis we segment foreground objects and background, and then apply different styles respectively. We use a fully convolutional neural network to perform semantic segmentation. We increase the reliability of the segmentation, and use the information of segmentation and the relationship between foreground objects and background to improve segmentation iteratively. We also use segmentation to improve optical flow, and apply different motion estimation methods between foreground objects and background. This improves the motion boundaries of optical flow, and solves the problems of incorrect and discontinuous segmentation caused by occlusion and shape deformation.
紀宏勳. "Adaptive Accordion Transformation based video compression method on HEVC." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/78850759570996940425.
Повний текст джерела國立交通大學
資訊科學與工程研究所
104
Fast processing speed and high compression ratio are always expected for video coding, especially for dealing with the increase of video resolutions and the demand of high quality. However, it is hard to compromise between each other since high compression ratio usually requires high coding complexities. Ouni et al. proposed a novel method called accordion-based (ACC) coding in which multiple video frames are combined into an accordion-like representation for compression and it can achieve high compression ratio with low coding complexity. Its coding efficiency is close to H.264/AVC for low-motion video at high bit-rates. However, it may no longer have benefit when applying the ACC to HEVC because HEVC has much better coding efficiency than H.264/AVC. Besides, it is not likely that all the frames in a video sequence are low-motion and thus suitable for ACC coding. To cope with these problems, in this thesis we propose an adaptive method which dynamically switches between accordion-based coding and traditional HEVC coding according to the characteristics of video frames. The experiment result shows that the proposed method can achieve up to 21.1% of total bit-rate saving and 58.6% of encoding time saving, compared to HEVC.
Wang, Xi. "Lecture Video Transformation through An Intelligent Analysis and Post-processing System." 2021. https://scholarworks.umass.edu/masters_theses_2/1078.
Повний текст джерелаChang, Hon-Hang, and 張閎翰. "Irregular Image Transformation and Balanced Error Distribution for Video Seam Carving." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/66233893384606489158.
Повний текст джерела國立中央大學
資訊工程學系
105
In recent years, more and more image retargeting techniques have been proposed to facilitate our daily life, in particular those based on the use of seam carving, warping or the combination of them. Although these techniques are rather sophisticated, they only work for a specific pattern during retargeting. For example, these techniques can only retarget the source picture into the same shape of a square, but cannot be easily reshaped into a circular, a polygon or other shapes. This paper focuses on creating a graphics editing system, named CMAIR (Content and Mask-Aware Image Retargeting), for image retargeting, which can retarget the source images into diff erent shapes of image to highlight the salient objects of primary interest. CMAIR eff ectively supports removal of unimportant pixels, and frames as many surrounding objects inside the provided mask as possible. In this paper, we propose a unique irregular interpolation method to produce four possible target images, and an evaluation mechanism to decide the best candidate image as the final output with the consideration of image saliency. The results show that not only the source image can be placed into different targeted shapes of mask, but also the salient objects are retained and highlighted as much as possible. As a result, the salient objects become more clear in our eyes. Besides, a video retargeting method named BED is proposed in this study, and the proposed algorithm in this thesis focuses on maintaining the structure of straight lines and irregular shape of objects without deforming complex image contents, which may be altered in traditional seam carving of complex image or video. In addition, the proposed mechanism maintains visual continuity such that the resulting videowill not look shaky due to sudden changes in the background. Practical applicability of the proposed method was tested using both regular videos and special videos which contain vanishing lines (i.e., perspective eff ects). Experimental results demonstrate that the proposed CMAIR can convert the rectangular image to another irregular shape of image, and all the salient objects of the targeted images are preserved. In our video results using BED, the BED approach not only resizes the video with the retention of important information, but also maintains the structural properties of objects in varios kinds of videos. The demonstration website at http://video.minelab.tw/DETS/ EDSeamCarving/ and http://video.minelab.tw/DETS/VRDSF/ provides comparison results that illustrate the contribution of our method.
Chen, Chii-Jen, and 陳啟禎. "Region-based Video Retrieval Using Watershed Transformation and Region Adjacency Graph." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/20064691487148607192.
Повний текст джерела國立中正大學
資訊工程研究所
89
In this paper we adopt the idea of region-based image retrieval into the video domain and propose an effective region-based video retrieval method. The goal of region-based video retrieval is to find the frames in an image sequence containing regions that match with the regions of the query image object having maximal similarity in region features and region adjacency relations. The main idea of our method is to combine the watershed transformation and the region adjacency graph (RAG). Each frame in an image sequence is first divided into several meaningful regions by the watershed transformation. After the watershed transformation, these regions and their spatial relationships of each frame will be represented with an RAG. In an RAG, a node represents a region and the spatial relationship of two neighboring regions is represented by an edge. In the retrieval processing, we adopt an efficient graph-matching algorithm to compare the RAG of a query image with the RAG of each frame. In order to improve the query time for the video retrieval, the scene change detection is adopted in the proposed method. In the new scene change detection method, the RAGs for neighboring frames are compared to decide whether a scene change occurs. To increase the accuracy rate for the scene change detection, two new smaller subRAGs, addition and deletion subRAGs depending on the addition and the deletion for the nodes and edges, can be generated from two neighboring RAGs. The evaluation of the similarity between two RAGs is to combine the distance score between the query image and key frame and these two subRAG’s distance scores. It is quite effective for our proposed method in experimental results on several test video sequences.
Hsu, Chih-Chiang, and 許志強. "Video Watermarking System Based on Hybrid Transformation Domain Technology and SVD." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/zbjrka.
Повний текст джерела國立虎尾科技大學
資訊工程系碩士班
106
Now the technology developed, so that the information is acquired more fast, it only needs to enter keywords on the search engine to find the file, pictures or video. Hence, the protection of intellectual property is more and more important in the society. The most common way for creators to protect their properties is digital watermarking technology. Using digital watermarking technology, the work of creator can be identified and it can prevent the attack by vandalism. In order to discuss the copyright owner and protect the intellectual property, in this thesis will focus on invisible digital watermarking based on transformation domain to achieve the purpose. A systematic framework of this thesis is based on group of pictures to build a robust video watermarking. First, a video sequence is decomposed into frames, taking some consecutive frames as a group. Each frame within a group be transformed into one-level discrete wavelet transform. Next, low frequency band (LL1) is separated into number of blocks which will transform into DCT. Then DC value of each block is picked and consisted of some DC value matrices. Each DC value matrix will be a singular value decomposition and do embed the watermark by means of the proposed procedures. In addition, in order to achieve the security of watermark, the watermark is prepermuted by using chaotic encryption. After encryption process, it can make the watermark embedding more robust. The experimental results of the presented system can be found that the proposed system is robust against noises, filtering, geometric rotation, and compression attacks with a good robustness and invisibility. Keywords: image hiding, groups of pictures (GOP), digital video watermarking, discrete wavelet transform (DWT), discrete cosine transform (DCT), singular value decomposition (SVD).
Chang, Chia-Hua, and 張家華. "A Power-Saving Scheme Using Adaptive Color Transformation for Video on OLED Displays." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/46357469852671702454.
Повний текст джерела國立臺灣科技大學
電子工程系
104
Displays based on organic light emitting diodes (OLEDs) is an emerging technology that has been widely used in mobile devices. It incorporates a varying power-demand character, which particularly inefficient for displaying bright colors. This thesis proposes a scheme that preserve hue information and reduce power consumption for video sequences on OLED displays based on the pixel dimming transformation. The dimming scheme uses the coefficient derived from the hue-saturation-value (HSV) representation and the luminance of the frame to modify each pixel. Thus, the proposed scheme allows the data adjustment directly on the red, green, and blue intensity of the contents. The temporal information between each frame is adopted to reduce the computation for video sequence processing. According to the measurement of several video sequences on an OLED display, up to 73% of displaying power can be reduced with mean visual saliency index of 0.961.
"The Metamorphosis of Performance: Oral Heritage and Medial Transformation in Kanywood Video Films." Berlin : Humboldt-Universität zu Berlin, 2020. http://d-nb.info/1215570325/34.
Повний текст джерелаLi, Hao, and 李晧. "Building Around Video Monitoring System Using Multiple Fish-Eye Cameras and Top-View Transformation Stitching." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/08832387619384204842.
Повний текст джерела國立臺北大學
資通科技產業碩士專班
102
Constant innovation in traffic and vehicle safety has prompted attention to the issue of blind spots around the vehicles during driving. Extensive research concerning driver assistance systems has been conducted and the blind areas around a vehicle have been determined to constitute a main threat to traffic safety. To address the problem of blind spots, some manufacturers install four cameras around the vehicle and build a top-view image of the surrounding area that is shown on an interior display. However, many such systems exhibit defects and blind areas remain. This study involved constructing a 360◦ top-view image of a vehicle by using multiple sh-eye cameras. The system consists of three components: distortion calibration of the fish-eye lenses, top-view image transformation, and merging of four images. We used Ration Function to implement the calibration and used matrix to transform the image to top-view, then utilized the property of matrix to reduce the error to complete the 360◦ image.
CHEN, HSUEH-YUAN, and 陳雪源. "Business Transformation and Business Model Design of Audio/Video Multimedia - A Case Study of Formosa Multimedia." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/agqcdd.
Повний текст джерела東海大學
高階經營管理碩士在職專班
105
Following the rapid development of Internet and the new trend of social live-stream media, usage of digital media of the general public has changed and many new business models are emerging as a result. The subject of this case study adapted a business model of “recording videos of public interests and sharing with the general public”, which created financial pressure from prolonged expenses without proper incomes. This study intends to discuss directions of innovation transformation and design practical new business models for the enterprise under examination, and allow the subject to achieve the goal of a successful business transformation. The study incorporated design of Dominant Innovation, workflow of Innovation and Entrepreneurship, and design of business model. In the first stage, innovation gaps in customer’s need are identified by applying the scenario analysis of gaps in dominant innovation workflow. In the second stage, “exploration of potential customers” in the workflow of “Innovation and Entrepreneurship” was applied, and assumptions of different business models were tested and verified, and scalable business model with sustainable profit were sought and designed. In the end of the study, a practical business model of potential direction of innovation transformation is successfully designed: by converting current audio/video service provider to a value-added integrated service provider of audio/video live-streams, and transforming its business model from “A Studio for Video of Public Interests” to “A Communities’ Audio/Video Communication Platform that Support Cooperation between Civic Movement Groups and Businesses.”
Tsai, Yi-Lin, and 蔡易霖. "Design of 2-D Inverse Transformation for Multi-Standard Video Coding Applications and Its Prototype System." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/75422605705154193868.
Повний текст джерела國立成功大學
電機工程學系碩博士班
96
Recently years, video compression technologies have received increasing attention. Many video compression standards such as MPEG-2, H.264/AVC and VC-1 have been proposed, therefore, many consumer digital products will support multi- standard video decoding. Alternatively we can design IPs independently for each standard and then combine them intuitively with little effort. However this may results in high hardware cost and low utilization. In this thesis we propose an architecture which supports multi-standard inverse-transformation, including MPEG-2, H.264/AVC and VC-1. In our design, we adopt two 1-D inverse-transformation (1×4) circuit to address 8×8 inverse discrete cosine transformation(IDCT) in MPEG-2, 4×4 inverse integer transformation in H.264/AVC and 8×8, 8×4, 4×8 and 4×4 inverse integer transformation in VC-1. Moreover, the multipliers are replaced with shifters and adders to further reduce hardware cost. We implement our circuit with Verilog, and then synthesize our design by using TSMC 0.18 �慆 CMOS technology. The maximum operating frequency of our design is 108 MHz and our circuit can real-timely decode video sequence under 2K1080 resolution. In order to integrate our design into multi-standard video decoding system, we use ARM RealView Platform Baseboard as our HW/SW co-simulation platform. First, we additionally design an AHB slave interface and Linux driver for our design. As for software we choose U-boot and embedded Linux as our boot-loader and operation system (OS) respectively. To achieve HW/SW co-simulation, we replace the source code of inverse transform in MPlayer by the Linux driver of our inverse transform circuit. It means that the operations of inverse transform are accomplished by the HW IP instead of software. From the experimental result, the decoding time can be reduced by 29% after our replacement. Moreover, the oncoming designs for multi-standard video decoding can also be integrated into this HW/SW co-simulation platform.
CHEN, YI-KAI, and 陳佾塏. "Semi-automatic 2D to 3D Video Conversion Technique Based on Regional Homographic Transformation for Background Sprite Generation." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/6s7vfr.
Повний текст джерела國立中正大學
電機工程研究所
106
This paper presents a novel semi-automatic 2D to 3D technology which makes the quality of depth map better by slightly human intervention. In here we divide the video into foreground and background, and generate the depth information separately through different algorithms, finally combine both of them to form the depth map corresponding to the input images. In foreground and background separation part, the key frames will be separated into foreground and background region through the graph cut algorithm, on the other hand for non-key frames we use label propagation to achieve it. In background depth generation, regional homographic transformation are calculated through the background regions at each frame, and integrated into the background Sprite model through the transformation. After user manually draws the depth map for the background Sprite model, the depth information can be retrieved by corresponding inverse transform to generate a sequence of background depth maps. In foreground depth generation, after the superpixel segmentation is performed through the foreground region, superpixel matching is used to match the (foreground region) super pixel set of the adjacent image. By manually drawn foreground depth information for key image we can propagate depth information to the non-key frames through the relationship between super pixel set of the adjacent image. Finally we can integrate the background and foreground depth information to complete depth map of the sequence of images.
Castro, Bernardo Braga e. "Digital transformation in recruitment : best practices in the Portuguese market." Master's thesis, 2019. http://hdl.handle.net/10400.14/29072.
Повний текст джерелаA “guerra pelo talento” está a levar a que as organizações se foquem na agilidade do processo de recrutamento e em employer branding para recrutar os melhores candidatos. Para tal, as empresas estão a recorrer cada vez mais à implementação de novas tecnologias nos seus processos de recrutamento e seleção. Esta dissertação foca-se em identificar o impacto que estas tecnologias podem causar, e quais as melhores práticas para a sua integração em processos de recrutamento da perspetiva dos recrutadores internos. Para tal, uma análise qualitativa foi conduzida através da investigação da literatura existente e da condução de entrevistas semiestruturadas com recrutadores. Os resultados mostram que a implementação de triagem de CV automática, entrevistas em vídeo assíncronas e jogos de avaliação têm um impacto positivo em processos de recrutamento, nomeadamente através de um aumento na precisão das avaliações, encurtamento da duração do processo, aumento da diversidade entre recrutados e permitir um volume de candidaturas maior. As empresas também se estão a focar em aumentar a integração de software e a coleta de métricas de recrutamento para melhoria contínua dos processos. Para a implementação bem-sucedida destas alterações, os recrutadores vêm a cultura organizacional como um fator chave.
Liu, William. "Moving last squares registration in computer vision: new applications and algorithms." Thesis, 2017. http://hdl.handle.net/2440/111454.
Повний текст джерелаThesis (Ph.D.) -- University of Adelaide, School of Computer Science, 2017.
Laber, Carina. "Digital transformation in the german healthcare industry : an analysis of the video consultation (teledoctor) and how it can shape the german healthcare industry." Master's thesis, 2019. http://hdl.handle.net/10400.14/27005.
Повний текст джерелаA indústria da saúde está, atualmente, a passar por uma transformação digital. Deste modo, a eficiência e a acessibilidade entre médicos e pacientes serão melhoradas através de conceitos inovadores de cuidados e tratamentos. Um destes conceitos inovadores é a telemedicina e, em particular, a videoconferência, que permite um tratamento independente da localização dos doentes através das tecnologias da informação e da comunicação. No entanto, este tipo de tratamento médico digital não está actualmente disponível de forma adequada na Alemanha. Portanto, este estudo exploratório lida com a situação atual e o potencial da consulta por vídeo na Alemanha, os desafios e os potenciais impactos da consulta por vídeo. Os resultados revelam que a estrutura legal da consulta em vídeo, o reembolso inadequado, a aceitação pelos pacientes e médicos e a falta de infraestrutura telemática expandida adequada são os principais desafios que dificultam o desenvolvimento futuro da consulta em vídeo. Ao mesmo tempo, uma suposição esclarecida mostrou que existe um tamanho potencial de consulta por vídeo baseado na aceitação dos médicos e pacientes. A consulta em vídeo e os recursos conectados mudam o sistema de saúde com base física para um sistema mais focado online e centrado no paciente, o que afetará todas as partes interessadas envolvidas. Os pacientes terão melhor acesso aos cuidados médicos e os médicos terão processos práticos mais eficientes e modelos de trabalho mais flexíveis. A fim de se adaptar à mudança digital da sociedade, os médicos devem fornecer VC e as companhias de seguros de saúde devem apoiá-la.
Будняк, Капітоліна Миколаївна. "Трансформація мультимедійного репортажу в сучасній журналістиці". Магістерська робота, 2022. https://dspace.znu.edu.ua/jspui/handle/12345/6512.
Повний текст джерелаUA : Тема магістерського дослідження: Трансформація мультимедійного репортажу в сучасній журналістиці. Обсяг основного тексту: 81 сторінка. Кількість використаних джерел – 89. Мета роботи – виявити тенденцій розвитку репортажу в умовах диджиталізації медіа на прикладі конкретних мультимедійних репортажів обраних інтернет-видань, що демонструє процеси їх трансформації у сучасній журналістиці. Для досягнення мети дослідження ми виконали такі завдання: 1) ознайомилися зі специфікою та різновидами репортажів; 2) виявили мультимедійні формати, які найчастіше зустрічаються в репортажах; 3) визначили зміни до яких призводить жанрова трансформація репортажу; 4) дослідили медійний простір на наявність у ньому мультимедійних репортажів; 5) узагальнили вплив мультимедійності на процес творення контенту українськими ЗМІ. Об’єкт дослідження: матерiали мультимедійних репортажів у таких інтернет-часописах, як «Zaxid.net» та «Reporters». Предмет дослідження: мультимедійні формати в репортажах, такі як: сатитична ілюстрація, фотострічка, слайд-шоу, відесосюжет, аудіоілюстрація та аудіоверсія тексту, відеоілюстрація та відеоверсія тексту тощо; а також прийоми та технології, що застосуються під час створення контенту; його трансформаційні зміни, зумовлені диджиталізацією та попитом аудиторії. Для виконання поставлених завдань у дослідженні застосовані такі методи: аналіз, синтез, аналогія, дедукція, індукція, термінологічний аналіз, описовий метод, прогнозування. Головним методом, який ми використали у практичній частині став аналіз. Теоретичну основу дослідження складають праці таких вчених: Б. Потятиника, З. Вайшенберга, Т. Крайнікової, І. Михайлина, З. Партико, О. Нестеренко, І. Тонкіх, О. Кацан, О. Лешко, О. Ремовської, О. Холоденка, М. Чабаненко, В. Шевченко, О. Полумисної, О. Рутковського та інших. Наукова новизна результатів полягає в тому, що: вперше: здійснюється порівняльно-описовий аналіз інтернет-видань «ZAXID.NET» ТА «REPORTERS», під час якого визначаються контентні особливості їх мультимедійних репортажів; удосконалено: відео візуальну класифікацію мультимедійних форматів; набуло подальшого розвитку: дослідження форматів мультимедіа; Практичне та теоретичне значення одержаних результатів. Результати дослідження можна використовувати пiд час пiдготовки лекцiйних та практичних дисциплiн, зокрема для занять з «Інтернет-журналістики», «Сучасних інформаційних технологій», «Журналістських жанрів», «Теорії та методики журналістської творчості». Окремі елементи дослідження можуть реалізовуватися під час медійної діяльності. Оскільки застосування сучасних мультимедійних форматів та творчих прийомів допоможе створювати затребувані репортажі, спрямовані на задоволення потреб аудиторії. Також їх можна використовувати у продовженні досліджень означеної теми.
EN : Budnyak K. M. Transformation of Multimedia Reporting in Modern Journalism. Zaporizhzhia, 2021. 81 p. The diploma paper discusses the use of multimedia formats in modern multimedia reports. Actuality of the research paper is connected to the genre transformation of reporting manifested in the following: the classic features are combined with the information layout, changing approach to textual and audio-visual content. Often the report can even be submitted in the format of a microsite, i.e. a landing page with its own navigation and structure. Therefore, its transformation requires scientific research and understanding. The paper’s goal is to identify trends in the development of the portal in the context of digitalization of the media on the example of specific multimedia reports of selected online publications, which demonstrates the processes of their transformation in modern journalism. The aims are to get acquainted with the specifics and types of reports; to identify multimedia formats that are most common in reports; to identify changes that lead to the genre transformation of reporting; to explore the media space for the presence of multimedia reports; to generalize the influence of multimedia on the process of content creation by the Ukrainian media. Used methods of research are analysis, synthesis, analogy, deduction, induction, terminological analysis, descriptive method, prediction. The main method we use in the practical part was the analysis. The result of the research paper is identified the role of multimedia formats in modern multimedia reporting. The study demonstrated the difference between the use of multimedia formats in reporting publications «Zaxid.net» and «Reporters».
"Three dimensional DCT based video compression." 1997. http://library.cuhk.edu.hk/record=b5889195.
Повний текст джерелаThesis (M.Phil.)--Chinese University of Hong Kong, 1997.
Includes bibliographical references (leaves 115-123).
Acknowledgments --- p.i
Table of Contents --- p.ii-v
List of Tables --- p.vi
List of Figures --- p.vii
Abstract --- p.1
Chapter Chapter 1 : --- Introduction
Chapter 1.1 --- An Introduction to Video Compression --- p.3
Chapter 1.2 --- Overview of Problems --- p.4
Chapter 1.2.1 --- Analog Video and Digital Problems --- p.4
Chapter 1.2.2 --- Low Bit Rate Application Problems --- p.4
Chapter 1.2.3 --- Real Time Video Compression Problems --- p.5
Chapter 1.2.4 --- Source Coding and Channel Coding Problems --- p.6
Chapter 1.2.5 --- Bit-rate and Quality Problems --- p.7
Chapter 1.3 --- Organization of the Thesis --- p.7
Chapter Chapter 2 : --- Background and Related Work
Chapter 2.1 --- Introduction --- p.9
Chapter 2.1.1 --- Analog Video --- p.9
Chapter 2.1.2 --- Digital Video --- p.10
Chapter 2.1.3 --- Color Theory --- p.10
Chapter 2.2 --- Video Coding --- p.12
Chapter 2.2.1 --- Predictive Coding --- p.12
Chapter 2.2.2 --- Vector Quantization --- p.12
Chapter 2.2.3 --- Subband Coding --- p.13
Chapter 2.2.4 --- Transform Coding --- p.14
Chapter 2.2.5 --- Hybrid Coding --- p.14
Chapter 2.3 --- Transform Coding --- p.15
Chapter 2.3.1 --- Discrete Cosine Transform --- p.16
Chapter 2.3.1.1 --- 1-D Fast Algorithms --- p.16
Chapter 2.3.1.2 --- 2-D Fast Algorithms --- p.17
Chapter 2.3.1.3 --- Multidimensional DCT Algorithms --- p.17
Chapter 2.3.2 --- Quantization --- p.18
Chapter 2.3.3 --- Entropy Coding --- p.18
Chapter 2.3.3.1 --- Huffman Coding --- p.19
Chapter 2.3.3.2 --- Arithmetic Coding --- p.19
Chapter Chapter 3 : --- Existing Compression Scheme
Chapter 3.1 --- Introduction --- p.20
Chapter 3.2 --- Motion JPEG --- p.20
Chapter 3.3 --- MPEG --- p.20
Chapter 3.4 --- H.261 --- p.22
Chapter 3.5 --- Other Techniques --- p.23
Chapter 3.5.1 --- Fractals --- p.23
Chapter 3.5.2 --- Wavelets --- p.23
Chapter 3.6 --- Proposed Solution --- p.24
Chapter 3.7 --- Summary --- p.25
Chapter Chapter 4 : --- Fast 3D-DCT Algorithms
Chapter 4.1 --- Introduction --- p.27
Chapter 4.1.1 --- Motivation --- p.27
Chapter 4.1.2 --- Potentials of 3D DCT --- p.28
Chapter 4.2 --- Three Dimensional Discrete Cosine Transform (3D-DCT) --- p.29
Chapter 4.2.1 --- Inverse 3D-DCT --- p.29
Chapter 4.2.2 --- Forward 3D-DCT --- p.30
Chapter 4.3 --- 3-D FCT (3-D Fast Cosine Transform Algorithm --- p.30
Chapter 4.3.1 --- Partitioning and Rearrangement of Data Cube --- p.30
Chapter 4.3.1.1 --- Spatio-temporal Data Cube --- p.30
Chapter 4.3.1.2 --- Spatio-temporal Transform Domain Cube --- p.31
Chapter 4.3.1.3 --- Coefficient Matrices --- p.31
Chapter 4.3.2 --- 3-D Inverse Fast Cosine Transform (3-D IFCT) --- p.32
Chapter 4.3.2.1 --- Matrix Representations --- p.32
Chapter 4.3.2.2 --- Simplification of the calculation steps --- p.33
Chapter 4.3.3 --- 3-D Forward Fast Cosine Transform (3-D FCT) --- p.35
Chapter 4.3.3.1 --- Decomposition --- p.35
Chapter 4.3.3.2 --- Reconstruction --- p.36
Chapter 4.4 --- The Fast Algorithm --- p.36
Chapter 4.5 --- Example using 4x4x4 IFCT --- p.38
Chapter 4.6 --- Complexity Comparison --- p.43
Chapter 4.6.1 --- Complexity of Multiplications --- p.43
Chapter 4.6.2 --- Complexity of Additions --- p.43
Chapter 4.7 --- Implementation Issues --- p.44
Chapter 4.8 --- Summary --- p.46
Chapter Chapter 5 : --- Quantization
Chapter 5.1 --- Introduction --- p.49
Chapter 5.2 --- Dynamic Ranges of 3D-DCT Coefficients --- p.49
Chapter 5.3 --- Distribution of 3D-DCT AC Coefficients --- p.54
Chapter 5.4 --- Quantization Volume --- p.55
Chapter 5.4.1 --- Shifted Complement Hyperboloid --- p.55
Chapter 5.4.2 --- Quantization Volume --- p.58
Chapter 5.5 --- Scan Order for Quantized 3D-DCT Coefficients --- p.59
Chapter 5.6 --- Finding Parameter Values --- p.60
Chapter 5.7 --- Experimental Results from Using the Proposed Quantization Values --- p.65
Chapter 5.8 --- Summary --- p.66
Chapter Chapter 6 : --- Entropy Coding
Chapter 6.1 --- Introduction --- p.69
Chapter 6.1.1 --- Huffman Coding --- p.69
Chapter 6.1.2 --- Arithmetic Coding --- p.71
Chapter 6.2 --- Zero Run-Length Encoding --- p.73
Chapter 6.2.1 --- Variable Length Coding in JPEG --- p.74
Chapter 6.2.1.1 --- Coding of the DC Coefficients --- p.74
Chapter 6.2.1.2 --- Coding of the DC Coefficients --- p.75
Chapter 6.2.2 --- Run-Level Encoding of the Quantized 3D-DCT Coefficients --- p.76
Chapter 6.3 --- Frequency Analysis of the Run-Length Patterns --- p.76
Chapter 6.3.1 --- The Frequency Distributions of the DC Coefficients --- p.77
Chapter 6.3.2 --- The Frequency Distributions of the DC Coefficients --- p.77
Chapter 6.4 --- Huffman Table Design --- p.84
Chapter 6.4.1 --- DC Huffman Table --- p.84
Chapter 6.4.2 --- AC Huffman Table --- p.85
Chapter 6.5 --- Implementation Issue --- p.85
Chapter 6.5.1 --- Get Category --- p.85
Chapter 6.5.2 --- Huffman Encode --- p.86
Chapter 6.5.3 --- Huffman Decode --- p.86
Chapter 6.5.4 --- PutBits --- p.88
Chapter 6.5.5 --- GetBits --- p.90
Chapter Chapter 7 : --- "Contributions, Concluding Remarks and Future Work"
Chapter 7.1 --- Contributions --- p.92
Chapter 7.2 --- Concluding Remarks --- p.93
Chapter 7.2.1 --- The Advantages of 3D DCT codec --- p.94
Chapter 7.2.2 --- Experimental Results --- p.95
Chapter 7.1 --- Future Work --- p.95
Chapter 7.2.1 --- Integer Discrete Cosine Transform Algorithms --- p.95
Chapter 7.2.2 --- Adaptive Quantization Volume --- p.96
Chapter 7.2.3 --- Adaptive Huffman Tables --- p.96
Appendices:
Appendix A : The detailed steps in the simplification of Equation 4.29 --- p.98
Appendix B : The program Listing of the Fast DCT Algorithms --- p.101
Appendix C : Tables to Illustrate the Reording of the Quantized Coefficients --- p.110
Appendix D : Sample Values of the Quantization Volume --- p.111
Appendix E : A 16-bit VLC table for AC Run-Level Pairs --- p.113
References --- p.115