| 摘要 |
A composite correlation surface having a high resolution first correlation surface and a lower resolution second correlation surface is calculated. The composite correlation surface thus calculated is then searched for correlation maximum M1, M2. The correlation maximum M1 from within a group of equally valid correlation maxima within the composite correlation surface that has the lowest magnitude displacement vector V1 is used to determine the motion vector for that correlation surface. Once motion vectors have been identified for all of the blocks making up the image, a small group of motion vectors is picked for each block in a vector reduction step prior to further processing. The search for motion vectors for inclusion in this group uses a predetermined selection test and takes place in a primary set of blocks abutting the target block in question and then in a secondary set of blocks surrounding the target block but spaced from the primary set blocks, <IMAGE> |
