method for characterization of a digital image and applications for

摘要

A method of characterizing a digital image, in which a point of interest (PI) in the detected in the image. For each &thetas; of a plurality I of different prescribed orientations in the digital image a family {f&thetas;(k)(n)}1≦̸K≦̸K of K one-dimensional lines f&thetas;(k)(n) of points is extracted from a region (RPI) of the image along K straight lines of orientation (&thetas;), and for each line f&thetas;(k)(n) and for each sub-sampling level s, a foveal energy signal E&thetas;,s(k)(n) is calculated using foveal wavelets. The signals E&thetas;,s(k)(n)) on the K lines and their arguments n are used to calculate a foveal signature SI characterizing the working region.