Method and device for detecting motion vectors

Details Method and device for detecting motion vectors Method and device for detecting motion vectors

1996-09-20

1999-04-13

Couso, Jose L.

Image analysis

Image compression or coding

Interframe coding

G06K 936

Patent

active

058945261

ABSTRACT:
A method of detecting motion vectors within a predetermined search range for motion-compensation predictive coding is disclosed. The method includes the steps of searching for first motion vectors between two frames which are separated from each other in a time dimension by a first frame distance, selecting a second frame distance of two frames between which picture motion is represented by second motion vectors, making a check whether the predetermined search range covers a predetermined percentage of the second motion vectors, the check using the first motion vectors as estimates of the second motion vectors after compensation for a difference between the first frame distance and the second frame distance, and deciding, based on results of the check, whether to increase a frame distance for prediction.

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Patent Abstracts Of Japan, vol. 96, No. 6, Jun. 28, 1996 & JP 08 046969 A (Matsushita Electric Ind. Co. LTD), Feb. 16, 1996.

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