MOTION COMPENSATED IMAGE PROCESSING

摘要

The movement of a regular pattern in a video image is determined by forming a correlation surface between search blocks in a pair of images; corresponding luminance values may be subtracted, so that points of maximum correlation are represented by minima. The position of a first maximum 430 is determined, and an exclusion region 460 set up about it in which further maxima are not detected. The position of a second maximum 440 is detected and an alias flag set if it is adjacent to the first maximum to indicate to further parts of the circuitry that the motion vector corresponding to the second maximum is potentially aliassed. Further circuitry may compare motion vectors having the alias flag set with other motion vectors and reset the alias flag as a result.