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In many image processing contexts there is a requirement for some form of motion estimation. A number of strategies exist, differing in the accuracy and granularity of the motion estimate and in their computational requirements. The simplest and most coarse-grained scheme is 'block' motion estimation, where the current frame is divided into blocks of pixels and for each block an estimate of its most likely motion is computed by reference to a neighbourhood in the previous frame. Such coarsedblp:conf/mva/NuddCHAFVW88 fatcat:t2ho3h547fhspp5p5i77jwtv24