Enhanced Downhill Simplex Search for Fast Video Motion Estimation
- 856 Downloads
Block-based motion estimation can be regarded as a function minimization problem in a finite two-dimensional space. Therefore, fast block-based motion estimation can be achieved by using an efficient function minimization algorithm instead of using a predefined search pattern, such as the diamond search. The downhill simplex search algorithm is an efficient derivative-free function minimization algorithm. In this paper, we propose several enhanced schemes to improve the efficiency of applying the downhill simplex search algorithm to motion estimation. The proposed enhanced schemes include a new initialization process, a special rounding method, and an early-stop error function evaluation procedure. Experimental results on several benchmarking videos show superior performance of the proposed algorithm over some existing fast block matching methods.
KeywordsMotion Vector Motion Estimation Full Search Diamond Search Simplex Search
Unable to display preview. Download preview PDF.
- 1.ISO/IEC 11172, Information technology - coding of moving pictures and associated audio for digital storage media at up to 1.5 Mbit/s (1993)Google Scholar
- 2.ISO/IEC 13818, Information technology - Generic coding of moving pictures and associated audio information, Part 2: Video (1995)Google Scholar
- 3.ISO/IEC 14496-2. Information technology - coding of audio-visual objects - Part 2: Visual (1998)Google Scholar
- 4.ITU-T Recommendation H.263. Video coding for low bit rate communication, Version 2 (1998) Google Scholar
- 5.ISO/IEC 14496-10 and ITU-T Recommendation H.264. Advanced Video Coding (2003)Google Scholar
- 6.Koga, T., Iinuma, K., Hirano, A., Iijima, Y., Ishiguro, T.: Motion compensated interframe coding for video conferencing. In: Proc. Nat. Telecommun. Conf., New Orleans, LA, November 29-December 3 (1981), G5.3.1-G5.3.5Google Scholar
- 11.Al-Mualla, M.E., Canagarajah, C.N., Bull, D.R.: Video coding for Mobile communications Efficiency, Complexity, and Resilience. Elsevier Science, Amsterdam (2002)Google Scholar