Method and apparatus for tracking a moving object
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United States of America Patent
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Jan 18, 1994
Grant Date -
N/A
app pub date -
Sep 5, 1991
filing date -
Sep 7, 1990
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method of tracking a moving object in a scene, for example the face of a person in videophone applications, comprises forming an initial template of the face, extracting a mask outlining the face, dividing the template into a plurality (for example sixteen) sub-templates, searching the next frame to find a match with the template, searching the next frame to find a match with each of the sub-templates, determining the displacements of each of the sub-templates with respect to the template, using the displacements to determine affine transform coefficients and performing an affine transform to produce an updated template and updated mask.
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