Patent ID: 6104439
Filing Date: 2000-08-15
Classification: G06T,H04N

Abstract:
A method for comparing an image signal between adjacent frames and estimating a motion of the image, the method comprising the steps of:constructing a first image segment representing a portion of present image frame and a second image segment having a plurality of image segments of an adjacent frame;comparing said plurality of image segments of said second image segment with the image signal within the first image segment, and generating a number of error values;detecting a first motion vector at one scale of resolution using the generated error values;outputting the error value associated with a reference segment pointed by the first motion vector, and the error values corresponding to the reference segment shifted by one unit of selected resolution respectively in selected direction(s);generating a second motion vector in finer scale of resolution using the output error values; andsumming the first and second motion vectors.