Method of establishing correspondence between a first digital image and a second digital image of the same scene to obtain disparities.

摘要

Method of establishing correspondence between a first digital image and a second digital image of the same scene to obtain disparities.; Establishment procedure correspondence between a first digital image and (U1) a second (U2), comprising the steps of:; a) selecting a block B1 U1 (x) determined so centered in a pixel x of U1;; b) selecting from U2 a series of blocks B2 (y {i}) of same manner as B1 (x);; c) calculating for each B2 (y {i}) a distance between B2 (y {i}) and B1 (x) as weighted sum f (x, z) of a function of the differences between values associated color of the pixels of same relative position z;; d) selecting the pixel and _ {i} that minimizes the distance between blocks, establishing a correspondence between pixels x and y _ {i} and giving disparity as the difference x {i} _ and - x,; where f depends on x and z and is a decreasing and not constant with respect to directional gradient module U1 (x + z) in one direction function.