Patent ID: 6430317
Filing Date: 2002-08-06
Classification: H04N

Abstract:
A method for determining whether a pixel block is substantially similar to a group of pixels within a reference pixel frame, said pixel block comprising a plurality of pixels rows, said method comprising the steps of:(a) loading, into a first register, a packed data representation of at least a portion of a row of pixels within said pixel block, wherein said packed data representation comprises representation of said pixels within a mean or an M-ary pyramid; (b) loading, into a second register, a packed data representation of at least a portion of a corresponding row of pixels within said reference image; (c) comparing, for each of a plurality of search positions, said packed data pixel representations of said first and second registers to produce a respective plurality of partial distortion measurements; (d) repeating, for each remaining portion of each row of pixels within said pixel block, steps (a), (b) and (c); and (e) determining, using said produced plurality of partial distortion measurements, whether said pixel block is substantially similar to a group of pixels within said corresponding rows of pixels within said reference image.