Patent ID: 6438254
Filing Date: 2002-08-20
Classification: G06T

Abstract:
A motion vector detection method including a motion vector detection process of searching a position of a prediction block, corresponding to a block to be processed as a processing target, on a reference frame under a prescribed condition, for each block comprising a predetermined number of pixels as a unit for processing image data of a frame to be processed, thereby to detect information indicating the position of the prediction block as a motion vector corresponding to the block to be processed, comprising:a calculation process of calculating an error of image data between a block corresponding to a motion vector search origin as a position where search of the position of the prediction block is started, and the block to be processed as the processing target, as a motion compensation error corresponding to the motion vector search origin; and a comparison process of comparing a motion compensation error corresponding to a neighboring block in the vicinity of the block to be processed, which is an error of image data between the neighboring block and a prediction block corresponding thereto, with the motion compensation error corresponding to the motion vector search origin, and switching between outputting positional information indicating the motion vector search origin as the motion vector corresponding to the block to be processed, according to a comparison result between both of the motion compensation errors, as the motion vector corresponding to the block to be processed, and outputting a motion vector which is obtained by performing the motion vector detection process with the motion vector search origin as a search starting position, as the motion vector corresponding to the block to be processed.