Image analysis – Image compression or coding – Interframe coding
Patent
1997-05-12
1998-10-06
Boudreau, Leo H.
Image analysis
Image compression or coding
Interframe coding
382232, 348407, 348416, 348699, G06K 936, H04N 712
Patent
active
058189696
ABSTRACT:
An intelligent start for a block-matching search is employed. Motion vectors which have been calculated for immediately adjacent blocks in the same image and for corresponding blocks in previous images are used. If the region upon which motion estimation is being performed is uniform and there is no disturbance motion estimation may be very fast. If there are many discontinuities, for example edges, then a more extensive search is required. To do this, possible candidate vectors are searched and a comparison measure is obtained for each. From these the best match is determined . A local fine search is then performed. The best motion vector can usually be found by examining only a few well-chosen candidate vectors. This greatly improves the efficiency of the search.
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Bella Matthew C.
Boudreau Leo H.
Intel Corporation
Kinsella, Esq. N. Stephan
Murray, Esq. William H.
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