Method and system for estimating a similarity between two binary images

摘要

The invention relates to a method and a system for estimating the resemblance between two images of optionally different modalities. More particularly, the invention makes it possible to characterize a similarity between two binary images according to a formula that allows registration of images acquired in the fields of teledetection, medical imaging, and industrial vision.

主权项

1. A method for indicating a similarity between two binary images Aai, Abj, said method being carried out by a processing unit of a system for analyzing similarities of images further including a storage device cooperating with said processing unit to store binary images, wherein the method comprises:
a step for extracting a first set of primitives from a first binary image Aai and a second set of primitives from a second binary image Abj, the first and second binary images being stored beforehand by the system, each primitive being associated with a pixel of a binary image and being characterized by the position of said pixel and by the orientation of an orientation line passing through the pixel; a step for measuring the presence of a common piece of information within said binary images and delivering a similarity indicator ε* therefor, said indicator being calculated by the processing unit as the relative deviation between an overall maximum H and the average of two other local maximums H′ and H″, i.e.,ɛ*=H-H~2⁢⁢where⁢⁢H~=H′+H″2,  said maximums being determined from a distribution of the different orientations of pairs of primitives respectively resulting from two extracted sets of primitives.