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báo cáo hóa học:" Research Article Rate Distortion Analysis and Bit Allocation Scheme for Wavelet Lifting-Based Multiview Image Coding"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Rate Distortion Analysis and Bit Allocation Scheme for Wavelet Lifting-Based Multiview Image Coding | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2009 Article ID 394065 13 pages doi 10.1155 2009 394065 Research Article Rate Distortion Analysis and Bit Allocation Scheme for Wavelet Lifting-Based Multiview Image Coding Pongsak Lasang1 and Wuttipong Kumwilaisak2 1 Media Processing Group Panasonic Singapore Laboratories PSL Block 1022 Tai Seng Avenue 06-3530 Singapore 534415 2 Communication and Multimedia Laboratory Department of Electronics and Telecommunication Faculty of Engineering King Mongkut s University of Technology Thonburi 126 Prachauthis Road Bangmod Tungkru Bangkok 10140 Thailand Correspondence should be addressed to Wuttipong Kumwilaisak wuttipong.kum@kmutt.ac.th Received 10 January 2009 Revised 17 May 2009 Accepted 13 August 2009 Recommended by Lisimachos P. Kondi This paper studies the distortion and the model-based bit allocation scheme of wavelet lifting-based multiview image coding. Redundancies among image views are removed by disparity-compensated wavelet lifting DCWL . The distortion prediction of the low-pass and high-pass subbands of each image view from the DCWL process is analyzed. The derived distortion is used with different rate distortion models in the bit allocation of multiview images. Rate distortion models including power model exponential model and the proposed combining the power and exponential models are studied. The proposed rate distortion model exploits the accuracy of both power and exponential models in a wide range of target bit rates. Then low-pass and high-pass subbands are compressed by SPIHT Set Partitioning in Hierarchical Trees with a bit allocation solution. We verify the derived distortion and the bit allocation with several sets of multiview images. The results show that the bit allocation solution based on the derived distortion and our bit allocation scheme provide closer results to those of the exhaustive search method in both allocated bits and peak-signal-to-noise ratio