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Search Results: 1 - 10 of 2676 matches for " Stereo Video "
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Stereo Video Transmission Using LDPC Code  [PDF]
Rui GUO, Lixin WANG, Xiaoxia JIANG
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2008, DOI: 10.4236/ijcns.2008.13031
Abstract: Stereo video is widely used because it can provide depth information. However, it is difficult to store and transmit stereo video due to the huge data amount. So, high efficient channel encoding algorithm and proper transmission strategy is needed to deal with the video transmission over limited bandwidth channel. In this paper, unequal error protection (UEP) based on low density parity check (LDPC) code was used to transmit stereo video over wireless channel with limited bandwidth. Different correction level LDPC code was used according to the importance of video stream to reconstruction at the receiver. Simulation result shows that the proposed transmission scheme increases the PSNR of reconstructed image, and improves the subjective effect.
New Algorithms for Object Segmentation and Stereo Correspondence in Stereo Video Coding

ZHU Zhong-Jie,YU Mei,JIANG Gang-Yi,WU Xun-Wei,

软件学报 , 2003,
Abstract: Video object segmentation and stereo correspondence is a key technology in object-based stereo video coding. In this paper, based on an algorithm for extracting video object in one view-channel, a new contour tracking and correspondence algorithm is first proposed for extracting stereo video object pairs. Then, a disparity estimation algorithm based on video objects is proposed. It takes a characteristic pixel as a correspondence primitive and the disparity estimation is implemented with disparity constraints. The disadvantages of discontinuous and imprecise disparities with the traditional block-based algorithms can be improved and a precise and smooth disparity field can be finally acquired.
Kind of video stream transmission method based on 3DTV codec technology

LIN Feng,

计算机应用研究 , 2011,
Abstract: The 3DTV codec technology and an optimized method of stereo video stream transmission are the key points to build a real-time stereo multi visual angle 3DTV system.Through the analysis of some techniques including stereo video compress coding and optimization,stereo video decoding,the motion and disparity compensation prediction,the paper realized an AVS standard definition stereo video stream transmission method combined a complementary content delivery technology of streaming media based on DSP platform n...
A New Object-Based System for Fractal Video Sequences Compression
Kamel Belloulata,Shiping Zhu
Journal of Multimedia , 2007, DOI: 10.4304/jmm.2.3.17-25
Abstract: A novel object-based fractal monocular and stereo video compression scheme with quadtree-based motion and disparity compensation is proposed in this paper. Fractal coding is adopted and each object is encoded independently by a prior image segmentation alpha plane, which is defined exactly as in MPEG-4. The first n frames of right video sequence are encoded by using the Circular Prediction Mapping (CPM) and the remaining frames are encoded by using the Non Contractive Interframe Mapping (NCIM). The CPM and NCIM methods accomplish the motion estimation/ compensation of right video sequence. According to the different coding or user requirements, the spatial correlations between the left and right frames can be explored by partial or full affine transformation quadtree-based disparity estimation/ compensation, or simply by applying CPM/NCIM on left video sequence. The testing results with the nature monocular and stereo video sequences provide promising performances at low bit rate coding. We believe it will be a powerful and efficient technique for the object-based monocular and stereo video sequences coding.
Depth Image-based Techniques for Compression, Transmission and Display of Auto-stereo Video
Zhuoyun Zhang,Chunping Hou,Zhigang Jin
Journal of Networks , 2010, DOI: 10.4304/jnw.5.9.1053-1059
Abstract: This paper proposes a novel framework for the processing of auto-stereo video. It is based on the video-plus-depth data representation and provides high compatibility with diverse displays.
Multiview Video Rate Control Scheme Based on Human Stereo Visual Feature

LU Shan,SUN Jun,WANG Jia,

中国图象图形学报 , 2009,
Abstract: This paper proposed a multiview video rate control scheme based on human stereo visual feature.First,the new quantitative measure for stereo video quality is introduced.Then,the bit allocation scheme is derived on the basis of this measure.Finally,the macroblock quantization parameters are modified according to the quantization parameter of the neighboring macroblock on the purpose of eliminating block effect in stereo video.The experiment results demonstrate that the proposed scheme can improve the stereo video quality and obtain quite stable rate.
Stereo Video Object Segmentation Based on Compressed Domain Information

ZHANG Qian,ZHANG Zhao-yang,AN Ping,

中国图象图形学报 , 2008,
Abstract: Stereo video object segmentation is a key technology in the multi-view video interacting. In this paper,based on the compressed domain information a novel stereo video object segmentation algorithm is proposed to improve the validity and accuracy of the segmentation. Firstly,we extract motion vectors and disparity field to segment the initial video object. Then we used the mean-shift algorithm to cluster the video object. Experimental results shows that the proposed algorithm could obtain the object with semantic confornity from the scene with complex texture.
Research of stereo video transmission and display

HUANG Ming,LI Shi-qi,YIN Wen-sheng,

计算机应用研究 , 2007,
Abstract: Based on the theory of human visual system, designed a stereo video transmission scheme. The scheme took two cameras to simulate the eyes of a human, used RTP protocol to transmit the two video images. Meanwhile, proposed an algorithm of time stamp matching to keep the two videos synchronous. Finally, introduced helmet-mounted display to display two videos.
Adaptive Digital Watermarking Algorithm for Stereo Video

ZHU Zhong-jie,WANG Yu-er,JIANG Gang-yi,LIANG Feng,ZHU Zhong-jie,WANG Yu-er,JIANG Gang-yi,LIANG Feng,ZHU Zhong-jie,WANG Yu-er,JIANG Gang-yi,LIANG Feng,ZHU Zhong-jie,WANG Yu-er,JIANG Gang-yi,LIANG Feng,

中国图象图形学报 , 2007,
Abstract: Stereo video is an important future trend in video technologies and intellectual property rights protection for stereo video should be resolved in advance to avoid piracy.In this paper,based on our previous research work on both digital watermarking and stereo video,a novel adaptive digital watermarking algorithm for stereo video is proposed after analyzing the characteristics of stereo video.The watermark is embedded into disparity vectors of enhancement-layer stream,without affecting the structure of base-layer stream.The proposed algorithm is an adaptive one,which keep the quality degradation of the overall reconstructed video images being the smallest.The whole watermarking process is mainly performed in compressed domain without the need of the fully decoding of compressed stream.And watermark detection can be blindly performed without the need of the original video sequence.As a whole,the proposed algorithm is fast,simple.Experimental results with several stereo sequences show that the embedding of watermark has little affection on image quality and the degradation of PSNR with the adaptive algorithm is smaller than that with non-adaptive algorithm.
Research of Geometric Model for Binocular Perception

中国图象图形学报 , 1998,
Abstract: 利用普通针孔成象的双摄像模型对双眼立体感知几何模型进行了研究,详细讨论了体视象空间的视觉重构,最后通过实验分析了影响体视的因素。
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