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检索条件"主题词=Model-based coding"
59 条 记 录,以下是11-20 订阅
排序:
An approach to distributed video coding using 3D face models
An approach to distributed video coding using 3D face models
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IEEE International Conference on Image Processing (ICIP 2006)
作者: Artigas, Xavi Torres, Luis Tech Univ Catalonia Barcelona Spain
Distributed Source coding (DSC), formulated thirty years ago, is lately witnessing a great research effort. This effort is encouraged by emerging new applications that could greatly benefit from the properties inheren... 详细信息
来源: 评论
The clustered causal state algorithm - Efficient pattern discovery for lossy data-compression applications
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COMPUTING IN SCIENCE & ENGINEERING 2006年 第5期8卷 59-67页
作者: Schmiedekamp, Mendel Subbu, Aparna Puoha, Shashi Penn State Univ Intelligent Control Dept Informat Sci & Technol Div Appl Res Lab University Pk PA 16802 USA
Pattern discovery is a potential boon for data compression, but current approaches are inefficient and produce cumbersome pattern descriptions. The clustered causal state algorithm is a new pattern-discovery algorithm... 详细信息
来源: 评论
Tracking a detected face with dynamic programming
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IMAGE AND VISION COMPUTING 2006年 第6期24卷 573-580页
作者: Yao, Zhengrong Li, Haibo Umea Univ Digital Media Lab S-90187 Umea Sweden
In this paper, we consider the problem of tracking a Moving human face in front of a video camera in real-time for a model-based coding application. The 3D head tracking in a MBC system could be implemented sequential... 详细信息
来源: 评论
Geometry-assisted image-based rendering for facial analysis and synthesis
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SIGNAL PROCESSING-IMAGE COMMUNICATION 2006年 第6期21卷 493-505页
作者: Eisert, Peter Rurainsky, Mrgen Heinrich Hertz Inst Nachrichtentech Berlin GmbH Fraunhofer Inst Telecommun D-10587 Berlin Germany
In this paper, we present an image-based method for the tracking and rendering of faces. We use the algorithm in an immersive video conferencing system where multiple participants are placed in a common virtual room. ... 详细信息
来源: 评论
Visual estimation and compression of facial motion parameters - Elements of a 3D model-based video coding system
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INTERNATIONAL JOURNAL OF COMPUTER VISION 2002年 第2期50卷 111-125页
作者: Tao, H Huang, TS Univ Calif Santa Cruz Dept Comp Engn Santa Cruz CA 95064 USA Univ Illinois Beckman Inst Image Proc & Format Lab Urbana IL 61801 USA
The MPEG4 standard supports the transmission and composition of facial animation with natural video by including a facial animation parameter (FAP) set that is defined based on the study of minimal facial actions and ... 详细信息
来源: 评论
model-based global and local motion estimation for videoconference sequences
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IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY 2004年 第9期14卷 1156-1161页
作者: Calvagno, G Fantozzi, F Rinaldo, R Viareggio, A Univ Padua Dipartimento Ingn Informaz I-35131 Padua Italy Univ Udine Dipartimento Ingn Elettr Gest & Meccan I-33100 Udine Italy
In this work, we present an algorithm for face 3-D motion estimation in videoconference sequences. The algorithm is able to estimate both the position of the face as an object in 3-D space (global motion) and the move... 详细信息
来源: 评论
model-based coding for multi-objects sequence
Model-based coding for multi-objects sequence
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Conference on Visual Communications and Image Processing 2001
作者: Liu, YH Yu, L Yao, QD Zhejiang Univ Inst Informat & Commun Engn Hangzhou 310027 Peoples R China
model-based coding has been studied mostly on video sequence with only one person. Normally there are several persons in the videoconference scenes. In this paper, model-based coding for multi-objects (or multi-person... 详细信息
来源: 评论
Generating realistic facial expressions with wrinkles for model-based coding
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COMPUTER VISION AND IMAGE UNDERSTANDING 2001年 第2期84卷 201-240页
作者: Yin, LJ Basu, A SUNY Binghamton Thomas J Watson Sch Engn & Appl Sci Dept Comp Sci Binghamton NY 13902 USA Univ Alberta Dept Comp Sci Edmonton AB T6G 2H1 Canada
Due to the limitations of current computer graphics technology mimicing realistic facial textures, such as wrinkles, is very difficult. Facial texture updating and compression are crucial to achieving realistic facial... 详细信息
来源: 评论
Synthesizing realistic facial animations using energy minimization for model-based coding
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PATTERN RECOGNITION 2001年 第11期34卷 2201-2213页
作者: Yin, LJ Basu, A Bernögger, S Pinz, A Univ Alberta Dept Comp Sci Edmonton AB T6G 2H1 Canada Graz Univ Technol Inst Comp Graph & Vis A-8010 Graz Austria
Accurate localization and tracking of facial features are crucial for developing high-quality model-based coding systems. In this paper we describe the integration of simple heuristics which are effective in improving... 详细信息
来源: 评论
Video coding of model-based at very low bit rates
Video coding of model-based at very low bit rates
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Conference on Visual Communications and Image Processing 2003
作者: Fu, XP Wang, Z Dalian Maritime Univ Dept Comp Sci & Technol Dalian 116026 Peoples R China
Very low bit rate coding is an important part of the MPEG-4 standard. To obtain maximum compression in videoconference sequences a technique called model-based coding can be used. With this technique, the face of the ... 详细信息
来源: 评论