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Дисертації з теми "Distortion estimation"

Автор: Grafiati

Опубліковано: 11 березня 2023

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1

Mitikiri, Praveen Kumar. "Rate distortion analysis for conditional motion estimation." Thesis, Wichita State University, 2008. http://hdl.handle.net/10057/2010.

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Rate Distortion analysis is a branch of information theory that predicts the tradeoffs between rate and distortion in source coding. In this thesis, we present the rate distortion analysis for conditional motion estimation, a process that estimates motion based on a criterion that affects coding rate, complexity of coding scheme and quality of the reconstructed video. In order to guide the rate distortion analysis, we use a conditional motion estimation scheme that estimates motion for certain blocks selected based on significant changes. We begin by explaining the conditional motion estimatio

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2

Mitikiri, Praveen Kumar Namuduri Kamiswara. "Rate distortion analysis for conditional motion estimation." A link to full text of this thesis in SOAR, 2008. http://hdl.handle.net/10057/2010.

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Thesis (M.S.)--Wichita State University, College of Engineering, Dept. of Electrical and Computer Engineering.<br>Copyright 2008 by Praveen Kumar Mitikiri. All Rights Reserved. Includes bibliographical references (leaves 28-31).

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3

Smith, Katherine Nicole. "New Methodology for the Estimation of StreamVane Design Flow Profiles." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/82039.

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Inlet distortion research has become increasingly important over the past several years as demands for aircraft flight efficiency and performance has increased. To accommodate these demands, research progression has shifted the emphasis onto airframe-engine integration and improved understanding of engine operability in less than ideal conditions. Swirl distortion, which is considered a type of non-uniform inflow inlet distortion, is characterized by the presence of swirling flow in an inlet. The presence of swirling flow entering an engine can affect the compression systems performance and op

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4

Kakarala, Avinash. "Hardware Implementation Of Conditional Motion Estimation In Video Coding." Thesis, University of North Texas, 2011. https://digital.library.unt.edu/ark:/67531/metadc103341/.

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This thesis presents the rate distortion analysis of conditional motion estimation, a process in which motion computation is restricted to only active pixels in the video. We model active pixels as independent and identically distributed Gaussian process and inactive pixels as Gaussian-Markov process and derive the rate distortion function based on conditional motion estimation. Rate-Distortion curves for the conditional motion estimation scheme are also presented. In addition this thesis also presents the hardware implementation of a block based motion estimation algorithm. Block matching alg

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5

Zhao, Zhanlue. "Performance Appraisal of Estimation Algorithms and Application of Estimation Algorithms to Target Tracking." ScholarWorks@UNO, 2006. http://scholarworks.uno.edu/td/394.

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This dissertation consists of two parts. The first part deals with the performance appraisal of estimation algorithms. The second part focuses on the application of estimation algorithms to target tracking. Performance appraisal is crucial for understanding, developing and comparing various estimation algorithms. In particular, with the evolvement of estimation theory and the increase of problem complexity, performance appraisal is getting more and more challenging for engineers to make comprehensive conclusions. However, the existing theoretical results are inadequate for practical r

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6

Bavikadi, Sathwika, and Venkata Bharath Botta. "Estimation and Correction of the Distortion in Forensic Image due to Rotation of the Photo Camera." Thesis, Blekinge Tekniska Högskola, Institutionen för tillämpad signalbehandling, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-15965.

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Images, in contrast to text, represent an effective and natural communication media for humans, due to their immediacy and the easy way to understand the image content. Shape recognition and pattern recognition are one of the most important tasks in the image processing. Crime scene photos should always be in focus and there should always be a ruler be present, this will allow the investigators the ability to resize the image to accurately reconstruct the scene. Therefore, the camera must be on a grounded platform such as tripod. Due to the rotation of the camera around the camera center there

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7

ZANAJ, BLERINA. "Estimation of vital parameters through the usage of UWB radars." Doctoral thesis, Università Politecnica delle Marche, 2013. http://hdl.handle.net/11566/242700.

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Il principale obiettivo della tesi è stato lo sviluppo di un insieme di algoritmi per la valutazione di parametri vitali, come il respiro ed il battito cardiaco, utilizzando un radar UWB. La ricerca fa parte di un progetto più esteso, denominato NIMURRA (Non Invasive Monitoring by Ultra Wide Band Radar of Respiratory Activity of people inside a spatial environment), che il Dipartimento di Ingegneria dell’Informazione dell’Università Politecnica delle Marche ha messo a punto per conto dell’Agenzia Spaziale Italiana (ASI). Al progetto hanno contribuito anche gruppi di ricerca provenienti d

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8

Toivonen, T. (Tuukka). "Efficient methods for video coding and processing." Doctoral thesis, University of Oulu, 2008. http://urn.fi/urn:isbn:9789514286957.

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Abstract This thesis presents several novel improvements to video coding algorithms, including block-based motion estimation, quantization selection, and video filtering. Most of the presented improvements are fully compatible with the standards in general use, including MPEG-1, MPEG-2, MPEG-4, H.261, H.263, and H.264. For quantization selection, new methods are developed based on the rate-distortion theory. The first method obtains locally optimal frame-level quantization parameter considering frame-wise dependencies. The method is applicable to generic optimization problems, including also

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9

Barr, Michael. "The Influence of the Projected Coordinate System on Animal Home Range Estimation Area." Scholar Commons, 2014. https://scholarcommons.usf.edu/etd/5343.

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Animal home range estimations are important for conservation planning and protecting the habitat of threatened species. The accuracy of home range calculations is influenced by the map projection chosen in a geographic information system (GIS) for data analysis. Different methods of projection will distort spatial data in different ways, so it is important to choose a projection that meets the needs of the research. The large number of projections in use today and the lack of distortion comparison between the various types make selecting the most appropriate projection a difficult decision. Th

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10

Li, Junlin. "Distributed estimation in resource-constrained wireless sensor networks." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26633.

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Thesis (Ph.D)--Electrical and Computer Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: Ghassan AlRegib; Committee Member: Elliot Moore; Committee Member: Monson H. Hayes; Committee Member: Paul A. Work; Committee Member: Ying Zhang. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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11

Tian, Yuandong. "Theory and Practice of Globally Optimal Deformation Estimation." Research Showcase @ CMU, 2013. http://repository.cmu.edu/dissertations/269.

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Nonrigid deformation modeling and estimation from images is a technically challenging task due to its nonlinear, nonconvex and high-dimensional nature. Traditional optimization procedures often rely on good initializations and give locally optimal solutions. On the other hand, learning-based methods that directly model the relationship between deformed images and their parameters either cannot handle complicated forms of mapping, or suffer from the Nyquist Limit and the curse of dimensionality due to high degrees of freedom in the deformation space. In particular, to achieve a worst-case guara

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12

D'Orlando, Marco. "Multimedia over wireless ip networks:distortion estimation and applications." Doctoral thesis, Università degli studi di Trieste, 2008. http://hdl.handle.net/10077/2583.

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2006/2007<br>This thesis deals with multimedia communication over unreliable and resource constrained IP-based packet-switched networks. The focus is on estimating, evaluating and enhancing the quality of streaming media services with particular regard to video services. The original contributions of this study involve mainly the development of three video distortion estimation techniques and the successive definition of some application scenarios used to demonstrate the benefits obtained applying such algorithms. The material presented in this dissertation is the result of the studies

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13

Zadeh, Ramin Agha. "Performance control of distributed generation using digital estimation of signal parameters." Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/47011/1/Ramin_Agha_Zadeh_Thesis.pdf.

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The Queensland University of Technology (QUT) allows the presentation of a thesis for the Degree of Doctor of Philosophy in the format of published or submitted papers, where such papers have been published, accepted or submitted during the period of candidature. This thesis is composed of seven published/submitted papers, of which one has been published, three accepted for publication and the other three are under review. This project is financially supported by an Australian Research Council (ARC) Discovery Grant with the aim of proposing strategies for the performance control of Distributed

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14

Silva, Leandro Rodrigues Manso. "Inteligência computacional aplicada à modelagem de cargas não-lineares e estimação de contribuição harmônica." Universidade Federal de Juiz de Fora (UFJF), 2012. https://repositorio.ufjf.br/jspui/handle/ufjf/4156.

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Submitted by Renata Lopes (renatasil82@gmail.com) on 2017-04-24T17:21:05Z No. of bitstreams: 1 leandrorodriguesmansosilva.pdf: 691785 bytes, checksum: 4024e0e319f1469cc354c2c346a90dbe (MD5)<br>Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2017-04-24T17:59:43Z (GMT) No. of bitstreams: 1 leandrorodriguesmansosilva.pdf: 691785 bytes, checksum: 4024e0e319f1469cc354c2c346a90dbe (MD5)<br>Made available in DSpace on 2017-04-24T17:59:43Z (GMT). No. of bitstreams: 1 leandrorodriguesmansosilva.pdf: 691785 bytes, checksum: 4024e0e319f1469cc354c2c346a90dbe (MD5)

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15

Werneck, Nicolau Leal. "Analise da distorção musical de guitarras eletricas." [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/259107.

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Orientador: Furio Damiani<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação<br>Made available in DSpace on 2018-08-11T03:06:29Z (GMT). No. of bitstreams: 1 Werneck_NicolauLeal_M.pdf: 1556046 bytes, checksum: 677310006250588d7e6a0fb0eedfc170 (MD5) Previous issue date: 2007<br>Resumo: Existem diversos problemas ligados à análise de sinais musicais que podem se beneficiar de um conhecimento mais detalhado da estrutura dos sinais gerados pelos diferentes instrumentos. Entre eles se destaca a compressão de sinais baseada em áudio estru

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16

Novanda, Happy. "Monitoring of power quality indices and assessment of signal distortions in wind farms." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/monitoring-of-power-quality-indices-and-assessment-of-signal-distortions-in-wind-farms(403a470c-279a-4b00-94dc-eaa2507dc579).html.

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Power quality has become one of major concerns in the power industry. It can be described as the reliability of the electric power to maintain continuity operation of end-use equipment. Power quality problems are defined as deviation of voltage or current waveforms from the ideal value. The expansion plan of wind power generation has raised concern regarding how it influences the voltage and current signals. The variability nature of wind energy and the requirements of wind power generation increase the potential problems such as frequency and harmonic distortions. In order to analyze and miti

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17

Elmansy, Dalia F. "Computational Methods to Characterize the Etiology of Complex Diseases at Multiple Levels." Case Western Reserve University School of Graduate Studies / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case1583416431321447.

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18

Popa, Emil Horia. "Algorithms for handling arbitrary lineshape distortions in Magnetic Resonance Spectroscopy and Spectroscopic Imaging." Phd thesis, Université Claude Bernard - Lyon I, 2010. http://tel.archives-ouvertes.fr/tel-00716176.

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Magnetic Resonance Spectroscopy (MRS) and Spectroscopic Imaging (MRSI) play an emerging role in clinical assessment, providing in vivo estimation of disease markers while being non-invasive and applicable to a large range of tissues. However, static magnetic field inhomogeneity, as well as eddy currents in the acquisition hardware, cause important distortions in the lineshape of acquired NMR spectra, possibly inducing significant bias in the estimation of metabolite concentrations. In the post-acquisition stage, this is classically handled through the use of pre-processing methods to correct t

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19

Bowman, Denise Michelle. "Estimating mechanical frequency tuning properties of the cochlea with f¦1- and f¦2-sweep distortion-product otoacoustic emission measurements in normal hearing human adults." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape15/PQDD_0001/NQ34658.pdf.

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20

Kadlčík, Libor. "Implementace rekonstrukčních metod pro čtení čárového kódu." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220266.

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Bar code stores information in the form of series of bars and gaps with various widths, and therefore can be considered as an example of bilevel (square) signal. Magnetic bar codes are created by applying slightly ferromagnetic material to a substrate. Sensing is done by reading oscillator, whose frequency is modulated by presence of the mentioned ferromagnetic material. Signal from the oscillator is then subjected to frequency demodulation. Due to temperature drift of the reading oscillator, the demodulated signal is accompanied by DC drift. Method for removal of the drift is introduced. Also

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21

Hassini, Sami. "Qualification multi-critères des gammes d'usinage : application aux pièces de structure aéronautique en alliage Airware®." Thesis, Clermont-Ferrand 2, 2015. http://www.theses.fr/2015CLF22587/document.

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L’optimisation des gammes d'usinage n’est pas aisée, car elle souffre de deux lacunes importantes. La première est axée sur l'adaptabilité des gammes existantes aux moyens actuels de production et à leurs évolutions au fil des années pour répondre aux évolutions technologiques. Le second point concerne, l’absence de prise en compte du comportement mécanique de la pièce durant l'usinage dans l'élaboration de la gamme. Ces travaux de thèse abordent ces problématiques dans le cadre du projet FUI OFELIA. Ils étudient, dans un premier temps l'influence de la gamme d’usinage sur la déformation de la

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22

Tai, Wei-Cheng, and 戴瑋呈. "Bandwidth-Rate-Distortion Optimized Motion Estimation." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/54972195086507966336.

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碩士<br>國立交通大學<br>電子工程系所<br>97<br>Motion estimation (ME) processing is the most computational and memory intensive component in H.264 encoder. However, traditional ME algorithms focus on rate and distortion performance and thus do not take memory bandwidth into consideration. Therefore, the rate and distortion performance are not optimized under bandwidth constraint. In this thesis, we propose bandwidth-rate-distortion (B-R-D) optimized ME algorithm to solve the issue mentioned above. First, we mainly propose a B-R-D optimized modeling method to determine an appropriate search range (SR) for max

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23

Chen, Chien-Sheng, and 陳建昇. "Partial Distortion Based Computation-Aware Motion Estimation." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/72212258995089613494.

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碩士<br>義守大學<br>資訊工程學系碩士班<br>99<br>In recent years, the development of wireless networks and multimedia application services provide solutions to achieve watching digital videos on hand-held devices. Video compression is an important technique for digital video transmission and storage, and the motion estimation is the most important part of video compression. In the early design, traditional motion estimation algorithms consider the “quality” rather than the “computation”. For hand-held devices, the computations for motion estimation could be overloaded, even using the fast algorithms, i.e., th

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24

Lin, Tai-Chiun, and 林泰群. "Threshold Partial Distortion Search Algorithm for Motion Estimation." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/58811629980763606682.

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碩士<br>大同大學<br>電機工程學系(所)<br>92<br>With the improvement of science and technology, the development of the network, and the exploitation of the HDTV, the demands of audio and video are increasing more and more. The Video coding technology is the solution to achieve these requirements. The purpose of motion estimation technology, which plays an important role in the video coding, is to remove the redundancy in video frame. The quality of the video is dependent on whether the motion estimation algorithm is good or not. Among all kinds of motion estimation algorithms, the full search algorithm is

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25

Po, Yi Shih, and 施伯宜. "Rate-Distortion Motion Estimation Algorithms Based on Kalman Filtering." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/37744605252264267167.

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碩士<br>義守大學<br>資訊工程學系<br>91<br>Motion estimation and compensation is widely used in video coding systems. To find motion vectors (MV) that lead to high compression, most conventional motion estimation approaches use a source distortion measure, such as mean-square error (MSE) or mean absolute error (MAE), as a search criterion. The resulting MV is used to generate a motion compensated prediction block and the motion compensated prediction difference frame (called residue blocks). When used in low bit-rate or very-low bit-rate video coding system, the bit rate for motion vector is more important

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26

吳文棋. "Adaptive motion estimation with partial distortion search for video coding." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/83977466635137439205.

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碩士<br>國立彰化師範大學<br>電子工程學系<br>96<br>With the advances of digital technologies and the proliferation of communication networks, multi-media contents consisting of both audio and video recordings continue to grow rapidly. Multi-media data generally takes huge storage space and also requires substantial amount of channel bandwidth to transmit. Many video coding standards exploit motion estimation (ME) to compress the video data by removing the inter-frame redundancy. This paper presents a new motion estimation algorithm, called the adaptive motion estimation with partial distortion search (AMEPDS).

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27

Chen-YaoYeh and 葉鎮僥. "Depth Map Coding Based on Distortion Estimation of Synthesized View." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/82536959461884920139.

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碩士<br>國立成功大學<br>電腦與通信工程研究所<br>102<br>3D video becomes more and more popular recent years. The multi-view video plus depth (MVD) format assisted with depth-image-based rendering (DIBR) technique is an efficient representation of 3D video. Conventionally in depth map coding, the distortion in the rate-distortion optimization (RDO) procedure is only measured with the sum of squared differences (SSD) of depth map. But depth map is just a supplementary data for view synthesis. So the quality of depth map is not highly correlated with the quality of the synthesized view, instead we should take the q

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28

Guo, Bin, and 郭賓. "Rate-Distortion-Computation Optimized Search Range Decision for Motion Estimation." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/51016122940924866625.

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碩士<br>國立東華大學<br>電機工程學系<br>97<br>In video coding standard, the motion estimation technique is widely adopted to significantly eliminate the temporal redundancies existing in video signal at the cost of intensive computational burden. To reduce the computational overhead of motion estimation, a dynamic search range decision algorithm is proposed in this thesis based on the Lagrange optimization approach which aims at optimizing the tradeoff between computational complexity and rate distortion performance. In addition, with the rapid popularity of computation resource constrained devices, computa

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29

Jackson, Edmund Stephen. "High ratio wavelet video compression through real-time rate-distortion estimation." Thesis, 2003. http://hdl.handle.net/10413/9044.

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The success of the wavelet transform in the compression of still images has prompted an expanding effort to exercise this transform in the compression of video. Most existing video compression methods incorporate techniques from still image compression, such techniques being abundant, well defined and successful. This dissertation commences with a thorough review and comparison of wavelet still image compression techniques. Thereafter an examination of wavelet video compression techniques is presented. Currently, the most effective video compression system is the DCT based framework, thus a co

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30

"Advances in end-to-end distortion estimation for error-resilient video networking." UNIVERSITY OF CALIFORNIA, SANTA BARBARA, 2010. http://pqdtopen.proquest.com/#viewpdf?dispub=3371682.

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31

Chien, Yu-Ming, and 簡裕民. "Suboptimal Quantization Control with Estimation of Rate- Distortion Relationship for Motion Video Coding." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/34784852886020596267.

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碩士<br>國立交通大學<br>電子研究所<br>84<br>For image and video coding under transmission constraints, determination of quantization steps at encoder plays an important role in controlling the generated bit-rate and coding performance. In this thesis, we analyze the quantization information from some Video CD titles and compare them with several known rate control algorithms. In addition, we investigate how to determine quantization steps for good coding quality. We approach this by improving on a well-

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32

Wang, Chih-Cheng, and 王志晟. "A Hybrid Error Concealment Technique for H.264/AVC Using Boundary Distortion Estimation." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/78950349271165472578.

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碩士<br>國立東華大學<br>資訊工程學系<br>98<br>Packet loss is prone to occurrence in the transmission channel due to error-prone network environments. It usually causes serious distortion, especially in highly compressed video coding standard. The distortion not only damages to single frame but also propagates to successive frames. To improve the distortion, error concealment techniques are adopted to restore lost video data in the decoder. In this thesis, a hybrid error concealment technique for H.264/AVC based on boundary distortion estimation has been proposed. It could efficiently restore the corrupted

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33

Zeng, Zhi-Xiu, and 曾智修. "Predistorter Based on Frequency Domain Estimation for Compensation of Nonlinear Distortion in OFDM Systems." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/56160915341228780722.

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碩士<br>國立中正大學<br>電機工程所<br>93<br>OFDM signal is very sensitive to the nonlinear distortion mainly caused by a power amplifier (PA) as a result of its high peak-to-average power ratio (PAPR). Predistortion, an effective countermeasure for balancing off the nonlinearity of a PA, is usually necessary for the sake of mitigating in-band distortion and spectrum regrowth. In the conventional schemes, a memoryless polynomial is generally used in modelling the PA characteristic or designing the predistorter. The polynomial coefficients are solved by least square (LS) estimation or adaptive identification

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34

Huang, Chen-Yi, and 黃振億. "Efficient Partial Distortion Search Algorithm for Motion Estimation by Dynamically Selecting the Representative Pixels." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/17771141698446361117.

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碩士<br>長庚大學<br>電機工程研究所<br>93<br>Motion estimation and Motion compensation are used in the compression standard such as MGEG x and H.26x in order to eliminate the temporal redundancy of the video sequences. But the techniques of the motion estimation need a large amount of computation to complete and waste a lot of time. The long time of the compression is not suitable in the present day. So, many fast block matching algorithms have been proposed in order to solve this problem. But most of the fast block matching algorithms degrade the image quality. In this thesis, we proposed the improved

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Jiang, Yan-ting, and 江彥廷. "Quality Estimation for H.264/SVC Spatial Scalability based on a New Quantization Distortion Model." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/81656358005251732964.

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碩士<br>國立中央大學<br>通訊工程研究所<br>99<br>Scalable Video Coding (SVC) provides efficient compression for the video bitstream equipped with various scalable configurations. H.264 scalable extension (H.264/SVC) is the most recent scalable coding standard. It involves state-of-the-art inter-layer prediction to provide higher coding efficiency than previous standards. Moreover, the requirements for the video quality on distinct situations like link conditions or video contents are usually different. Therefore, how to efficiently provide suitable video quality to users under different situations is an impor

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Ciou, Jian-Hong, and 邱建宏. "New String Techniques on Partial Distortion Search for Fast Optimal Motion Estimation of the Video Encoding." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/y65nu9.

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碩士<br>國立臺中科技大學<br>資訊工程系碩士班<br>100<br>Motion estimation has been widely used in many video applications such as video compression, video segmentation, and video tracking. Efficient block matching algorithms (BMAs) have received considerable attention and have been adopted in modern video compression standards such as ISO/IEC MPEG1/2/4 and ITU-T H.263/H.264. The experimental results have shown motion estimation can consume 60% (1 reference frame) to 80% (5 reference frames) of the total encoding time of H.264 codec. The Full-Search MB-Matching (FSBM) method was first proposed to search for the b

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Tonini, Andrea. "Remote estimation of target height using unmanned air vehicles (UAVs)." Master's thesis, 2019. http://hdl.handle.net/10362/84351.

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Dissertation presented as partial requirement for obtaining the Master’s degree in Information Management, with a specialization in Business Intelligence and Knowledge Management<br>Estimation of target height from videos is used for several applications, such as monitoring agricultural plants growth or, within surveillance scenarios, supporting the identification of persons of interest. Several studies have been conducted in this domain but, in almost all the cases, only fixed cameras were considered. Nowadays, lightweight UAVs are often employed for remote monitoring and surveillance acti

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Yang, Chao-Cing, and 楊趙清. "Priority-Based Partial Distortion Search Algorithm for Fast Motion Estimation in H.264/AVC Video Coding Standard." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/z5zkmv.

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碩士<br>國立東華大學<br>電機工程學系<br>95<br>The newest video coding standard called H.264 provides considerable performance improvement over a wide range of bit rates and video resolutions compared to previous standards. In H.264, the motion estimation module occupies the largest computational complexity in an encoder, and it supports seven various block sizes with a tree structured macroblock partition. In order to reduce the computational complexity of motion estimation in H.264, Priority-Based Normalized Partial Distortion Search Algorithm for Fast Motion Estimation, Adaptive Search Range Decision, Sea

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Xu, Zhi-Xiong, and 許智雄. "Combining Dynamic Search Range with Improved Normalized Partial Distortion Search for Fast Motion Estimation Algorithm in Video Coding." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/cg67wv.

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碩士<br>國立臺中科技大學<br>資訊工程系碩士班<br>100<br>H.264/AVC is JVT video coding standard developed by a good video coding efficiency, in recent years, with the network bandwidth improvements, and advances in technology, multimedia products and services continued to emerge, such as video telephone, on-demand video system (VOD), video conferencing, high-definition digital television (HDTV), etc.. All need a good video compression standards support in the H.264/AVC encoder architecture. Motion estimated (ME) is the compression of the entire video, accounted for the largest amount of computation, this thesis

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Hong, Hao-feng, and 洪浩峰. "Estimation of nonlinear distortions of loudspeakers." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/46384440177344027798.

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碩士<br>國立海洋大學<br>電機工程學系<br>85<br>The loudspeaker in a sound system has much to do with the quality of speech or music signals replayed by the system. However, it is also the weakest link of the overall sound system. This is due to the fact that nonlinear phenomena may exist in the electronic circuit, mechanical structure, and material design of a loudspeaker. This causes the loudspeaker to generate harmonic and intermodulation distortions which degrade the performance

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Luo, Shih-Chung, and 羅世崇. "Estimating Total-Harmonic-Distortion of Analog Signal in Time-Domain." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/54418096252022565708.

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碩士<br>國立雲林科技大學<br>電子與光電工程研究所碩士班<br>100<br>In this work, we propose a methodology to estimate Total-Harmonic-Distortion (THD) in time domain. Instead of using Fast-Fourier-Transform (FFT), we express the signal under test into Taylor expansion and derive the relationship between coefficients of Taylor series and composition of harmonic. Furthermore, through analyzing syndromes on signal under test with respect to coefficients of Taylor series and extracting effective information, we calculate these coefficients and translate into harmonic distortion by Parseval’s theorem. The required instrumen

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"Estimation and correction of geometric distortions in side-scan sonar images." Research Laboratory of Electronics, Massachusetts Institute of Technology, 1990. http://hdl.handle.net/1721.1/4196.

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Daniel T. Cobra.<br>Also issued as Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1990.<br>Includes bibliographical references (p. 137-141).<br>Supported in part by the Defense Advanced Research Projects Agency monitored by the Office of Naval Research. N00014-89-J-1489 Supported in part by the National Science Foundation. MIP-87-14969 Supported in part by Lockheed Sanders, Inc.

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Raju, Jampana V. S. "Air-Sea Flux Measurements Over The Bay Of Bengal During A Summer Monsoon." Thesis, 2006. http://hdl.handle.net/2005/437.

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Majority of the rain producing monsoon systems in India form or intensify over the Bay of Bengal and move onto the land. We expect the air-sea interaction to be a crucial factor in the frequent genesis and intensification of monsoon systems over the Bay. Knowledge of air-sea fluxes is essential in determining the air-sea interactions. However, the Bay remains a poorly monitored ocean basin and the state of the near surface conditions during the monsoon months remains to be studied in detail. For example, we do not know yet which among the various flux formulae used in the General circulation m

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Lindsey, Laurence Francis. "Estimating the effects of lens distortion on serial section electron microscopy images." Thesis, 2012. http://hdl.handle.net/2152/ETD-UT-2012-08-6210.

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Section to section alignment is a preliminary step to the creation of three dimensional reconstructions from serial section electron micrographs. Typically, the micrograph of one section is aligned to its neighbors by analyzing a set of fiducial points to calculate an appropriate polynomial transform. This transform is then used to map all of the pixels of the micrograph into alignment. Such transforms are usually linear or piecewise linear in order to limit the accumulation of small errors, which may occur with the use of higher–order approximations. Linear alignment is unable to correct comm

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De, Michele Anne McGrath. "Estimating human cochlear traveling wave velocity using distortion product otoacoustic emission and auditory brainstem response measurements /." 2003. http://wwwlib.umi.com/dissertations/fullcit/3073584.

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