Method and apparatus for contour motion estimating a binary imag

Details Method and apparatus for contour motion estimating a binary imag Method and apparatus for contour motion estimating a binary imag

1997-08-25

1999-10-19

Lee, Richard

Television

Bandwidth reduction system

Data rate reduction

348416, 348699, 382236, 382239, H04N 732

Patent

active

059697660

ABSTRACT:
A motion estimating method, for use in a motion estimation between a current and a previous frames of a binary video image, wherein the current frame is divided into a plurality of equal sized search blocks, forms a search region corresponding to each search block within the previous frame and a plurality of candidate blocks within the search region, each of the candidate blocks having a same size as the search block, to thereby provide a displacement of each candidate block from the search block as a displacement vector of each candidate block. Thereafter, the method overlaps the search block with each candidate block to thereby determine an unmatched region, a boundary of a matched region and a boundary of the search block and assigns a weight to each of the pixels within the unmatched region on a predetermined basis, wherein the weight may vary from pixel to pixel. Then, the method calculates a weighted error of each candidate block by using the weights and selects a displacement vector which has a minimum error as an optimum motion vector.

REFERENCES:
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patent: 5561475 (1996-10-01), Jung
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patent: 5689312 (1997-11-01), Kim
patent: 5754237 (1998-05-01), Jung
patent: 5760845 (1998-06-01), Kim
patent: 5808685 (1998-09-01), Jung
patent: 5838391 (1998-11-01), Kim

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