Method of estimation and of hierarchised coding of the motion of image sequences
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United States of America Patent
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Aug 1, 2000
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N/A
app pub date -
Jul 7, 1993
filing date -
Nov 27, 1991
priority date (Note) -
Expired
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Abstract
The present invention relates to a method of estimation and of hierarchised coding of the motion of image sequences, consisting in partitioning the current image into macroblocks, the macroblocks into four blocks and so on, and then determining at each level a motion-vector field associated with this division, by using an iterative and recursive estimation algorithm initialised with motion vectors estimated at the previous level, and in determining a final motion-vector field from the p resulting motion-vector fields. The motion-vector field is determined using the differences in luminances between blocks corresponding in the successive images through the estimated displacement vectors of the p levels of division corresponding to each block of minimum size, and by choosing as motion vector associated with the block of minimum size the one for which the difference in luminance is a minimum over this block. The invention applies in particular to the coding of HD-MAC television images.
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