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Motion parameter estimation based on the block recursive algorithm with finite word length

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3 Author(s)
Pei-Chuan Liu ; Dept. of Electron. Eng., Chiao-Tung Univ., Taiwan, China ; Wen-Thong Chang ; Wen-Zen Shen

A three parameter motion model can better describe the motion trajectory of the picture element in a video sequence. Combining the features of the block process and recursive estimation, a block recursive algorithm is proposed to calculate these three motion parameters with compensation for the variety of block positions to get a better stability. To simplify the hardware implementation requirements, the representation accuracy of the displaced frame difference and gradient that are given is analyzed. From this analysis we propose a quantized block recursive algorithm with quantized gradient to reduce the computational complexity. With this simplification the quantized motion estimation algorithm has a sufficient computational speed to meet the requirement of real time application with the least accuracy loss

Published in:

IEEE Transactions on Consumer Electronics  (Volume:43 ,  Issue: 4 )