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检索条件"主题词=Model-based coding"
59 条 记 录,以下是21-30 订阅
排序:
A robust model generation technique for model-based video coding
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IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY 2001年 第11期11卷 1188-1192页
作者: Siu, M Chan, YH Siu, WC Hong Kong Polytech Univ Dept Elect & Informat Engn Ctr Multimedia Signal Proc Hong Kong Hong Kong Peoples R China
In conventional model-based coding schemes, predefined static models are generally used. These models cannot adapt to new situations, and hence, they have to be very specific and cannot be generated from a single gene... 详细信息
来源: 评论
modeling of 2D+1 texture movies for video coding
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IMAGE AND VISION COMPUTING 2003年 第1期21卷 49-59页
作者: Valaeys, S Menegaz, G Ziliani, F Reichel, J Swiss Fed Inst Technol Audio Visual Commun Lab CH-1015 Lausanne Switzerland VisioWave SA CH-1024 Ecublens Switzerland
We propose a novel model-based coding system for video. model-based coding aims at improving compression gain by replacing the non-informative image elements with some perceptually equivalent models. Images enclosing ... 详细信息
来源: 评论
Multi-view coding for Image-based Rendering using 3-D scene geometry
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IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY 2003年 第11期13卷 1092-1106页
作者: Magnor, M Ramanathan, P Girod, B Max Planck Inst Informat D-66123 Saarbrucken Germany Stanford Univ Stanford CA 94305 USA
To store and transmit the large, amount of image data necessary for Image-based Rendering (IBR), efficient coding schemes are required. This paper presents two different approaches which exploit three-dimensional scen... 详细信息
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Hierarchical motion estimation with content-based meshes
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IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY 2003年 第10期13卷 1000-1005页
作者: Al-Regib, G Altunbasak, Y Mersereau, RM Georgia Inst Technol Ctr Signal & Image Proc Atlanta GA 30332 USA
Two-dimensional mesh-based models provide a good alternative to motion estimation and compensation. The estimation of the best node-point motion vectors is a challenging task. To this effect, Nakaya and Harashima prop... 详细信息
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MPEG-4 facial animation in video analysis and synthesis
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INTERNATIONAL JOURNAL OF IMAGING SYSTEMS AND TECHNOLOGY 2003年 第5期13卷 245-256页
作者: Eisert, P Heinrich Hertz Inst Nachrichtentech Berlin GmbH Fraunhofer Inst Telecommun Image Proc Dept D-10587 Berlin Germany
MPEG-4 supports the definition, encoding, transmission, and animation of 3-D head and body models. These features can be used for a variety of different applications ranging from low bit-rate video coding to character... 详细信息
来源: 评论
Immersive 3-D video conferencing: Challenges, concepts, and implementations
Immersive 3-D video conferencing: Challenges, concepts, and ...
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Conference on Visual Communications and Image Processing 2003
作者: Eisert, P Fraunhofer Inst Telecommun Heinrich Hertz Inst Image Proc Dept D-10587 Berlin Germany
In this paper, a next generation 3-D video conferencing system is presented that provides immersive tele-presence and natural representation of all participants in a shared virtual meeting space. The system is based o... 详细信息
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Automatic facial feature extraction in model-based coding
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JOURNAL OF INFORMATION SCIENCE AND ENGINEERING 2000年 第3期16卷 447-458页
作者: Chuang, MM Chang, RF Huang, YL Natl Chung Cheng Univ Dept Comp Sci & Informat Engn Adv Syst Integrat Lab Chiayi 621 Taiwan
model-based coding is a new image sequence compression technique for very low bit rate coding. Most researchers have paid more attention to facial image analysis and synthesis because facial images are very important ... 详细信息
来源: 评论
FAP extraction using three-dimensional motion estimation
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IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY 2002年 第10期12卷 865-876页
作者: Sarris, N Grammalidis, N Strintzis, MG Aristotle Univ Thessaloniki GR-54006 Thessaloniki Greece
An integral part of the MPEG-4 standard is the definition of face animation parameters (FAPs). This paper presents a method for the determination of FAPs by using three dimensional (3-D) rigid and nonrigid motion of h... 详细信息
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Facial model adaptation from a monocular image sequence using a textured polygonal model
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SIGNAL PROCESSING-IMAGE COMMUNICATION 2002年 第5期17卷 373-392页
作者: Chang, YJ Chen, YC Natl Tsing Hua Univ Dept Elect Engn Hsinchu 30013 Taiwan
Although several algorithms have been proposed for facial model adaptation from image sequences, the insufficient feature set to adapt a full facial model, imperfect matching of feature points, and imprecise head moti... 详细信息
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An active model for facial feature tracking
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EURASIP JOURNAL ON APPLIED SIGNAL PROCESSING 2002年 第6期2002卷 566-571页
作者: Ahlberg, J Linkoping Univ Dept Elect Engn Image Coding Grp SE-58131 Linkoping Sweden
We present a system for finding and tracking a face and extract global and local animation parameters from a video sequence. The system uses an initial colour processing step for finding a rough estimate of the positi... 详细信息
来源: 评论