Articles

Edge-based motion estimation and region-based contour tracing for very low bit rate video coding

[+] Author Affiliations
Her-Hsiung Chang, Long Wen Chang

National Tsing Hua University, Department of Computer Science, Hsinchu, Taiwan ?

J. Electron. Imaging. 7(1), 127-135 (Jan 01, 1998). doi:10.1117/1.482634
History: Received Feb. 28, 1997; Revised June 27, 1997; Accepted Aug. 5, 1997
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Abstract

A new algorithm for image sequence coding with a very low bit rate and high picture quality is proposed. The proposed coding system is composed of interframe and intraframe coding. In the interframe coding, an edge-based motion estimation algorithm is used to find the motion vector of a moving block instead of using the conventional block-matching algorithm. The edge-based method reduces the entropy of the estimated motion vectors within a frame. Since the motion vectors are usually encoded by entropy coding, bit rate is also reduced. In the intraframe coding, a region-based algorithm is used to trace the contour of an object and estimate its parameters from a predetermined database of various geometric shapes. It can reduce the blocking effect. By testing several image sequences such as “Miss America” and “Claire” with 10 frames/s in quarter common intermediate format (QCIF) the proposed coding system has about 1 to 2 dBs higher peak SNRs than the H.263 system. © 1998 SPIE and IS&T.

© 1998 SPIE and IS&T

Citation

Her-Hsiung Chang and Long Wen Chang
"Edge-based motion estimation and region-based contour tracing for very low bit rate video coding", J. Electron. Imaging. 7(1), 127-135 (Jan 01, 1998). ; http://dx.doi.org/10.1117/1.482634


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