By Chao Jiang, Ze-xun Geng, Xiao-feng Wei, Chen Shen (auth.), Wenjun Zhang, Xiaokang Yang, Zhixiang Xu, Ping An, Qizhen Liu, Yue Lu (eds.)

ISBN-10: 3642345948

ISBN-13: 9783642345944

ISBN-10: 3642345956

ISBN-13: 9783642345951

This e-book constitutes the refereed lawsuits of the ninth overseas discussion board on electronic television and instant Multimedia verbal exchange, IFTC 2012, Shanghai, China, November. The sixty nine revised complete papers awarded have been rigorously reviewed and chosen from quite a few submissions. The papers are prepared in topical sections on photograph processing and development attractiveness; picture and video research; photo caliber evaluate; textual content picture and speech processing; content material retrieval and safety; resource coding; multimedia verbal exchange; new advances in broadband multimedia; human laptop interface; 3D video.

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Extra info for Advances on Digital Television and Wireless Multimedia Communications: 9th International Forum on Digital TV and Wireless Multimedia Communication, IFTC 2012, Shanghai, China, November 9-10, 2012. Proceedings

Example text

Only one kernel function for propagation is needed. Each launch of kernel completes one complete propagation round with step length of l. Since the threads of different blocks cannot be synchronized, we have to store two k-nearest neighbor heaps, one for the former round, and one for the current round. In initialization, two heaps share the same value. In the propagation process, each thread inquiries the offset stored in the former heap, compares it to the one in current heap, and completes the sift down operation in current heap if needed.

In the i-th window wi, a simplest linear compression function is used Z j = pi E j + qi , j ∈ wi (5) where Z and E represent LDR image and HDR radiance map respectively. Parameter pi controls the compression ratio of local contrast and qi controls the average intensity value in the window. The compressed LDR image can be constructed by minimizing 34 T. Zhao and Y. Xu  2 2 f =  f i =    [Z j − pi E j − qi ] + εci2 ( pi − ci )  (6) i i  j∈wi  ci controls the compression ratios of local contrasts and is introduced to avoid trivial solutions.

ConsidNVIDIA ering the inherently parallel-friendly nature, our algorithm can be implemented TM efficiently on GPU with CUDA . e. each thread in the kernel computes k-nearest neighbors to one patch in image A as depicted in image 2. The patches of different threads are mutually exclusive. Only one kernel function for propagation is needed. Each launch of kernel completes one complete propagation round with step length of l. Since the threads of different blocks cannot be synchronized, we have to store two k-nearest neighbor heaps, one for the former round, and one for the current round.

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Advances on Digital Television and Wireless Multimedia Communications: 9th International Forum on Digital TV and Wireless Multimedia Communication, IFTC 2012, Shanghai, China, November 9-10, 2012. Proceedings by Chao Jiang, Ze-xun Geng, Xiao-feng Wei, Chen Shen (auth.), Wenjun Zhang, Xiaokang Yang, Zhixiang Xu, Ping An, Qizhen Liu, Yue Lu (eds.)


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