Fast half-pixel motion estimation using steepest descent
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United States of America Patent
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Feb 7, 2006
Grant Date -
Apr 10, 2003
app pub date -
Sep 5, 2001
filing date -
Sep 5, 2001
priority date (Note) -
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Abstract
A method of locating a half-pixel resolution motion vector. The method first determines a sum of absolute difference for a predetermined number of neighbors to a current pixel. The gradient of these sums of absolute differences is then calculated. A motion vector is then selected based upon the gradient that indicates which vector lies in a direction of steepest descent. This motion vector is then used in motion compensation for video compression.
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