Matching images by comparing their gradient fields

Abstract

We present a simple yet powerful method to performpoint-to-point matching between two images. Themethod uses an evidence measure, whose value for agiven displacement reflects both the similarity betweentwo locations and the confidence in a correct match.The measure is based on the gradient fields of the images,and can be computed quickly and in parallel.Accumulating the evidence measure for different displacementsallows (1) stable computation of correspondenceswithout smoothing across...