| 摘要 |
A method for determining motion between a first and second video image comprises receiving a first video image comprising a plurality of pixels, selecting a block of pixels within the first video image (48), receiving a second video image comprising a plurality of pixels, selecting at least part of the second video image to produce a search area (47), sampling the pixels of the search area in a predetermined pattern and comparing the selected block of pixels within the first video image with at least one block of the sampled pixels of the search area to determine the motion of the block of pixels between the images (44) wherein the pattern of sampled pixels varies throughout the search area. The pattern of sampled pixels may include sampling in horizontal and vertical directions. The pattern of sampled pixels may be dependent on the direction in which motion estimation is required to be most accurate. The degree of sampling may be increased at increased distances from the centre of the search area. |
