关键词: 双目立体视觉, 边缘立体匹配, 三项式拟合, 极值约束, 光源

Abstract: In order to extract the edge characteristics of the sole, a binocular stereo vision measurement method is proposed, in which light source is placed in the middle of sole, so as to increase internal and external contrast ratio of the edge
in captured images. As for feature matching at the?heel and toe cap, a stereo matching method is proposed based on extreme constraint. This algorithm is composed of the following three steps: a canny operator is applied to the image to extract edges. The algorithm fits a three time polynomial curve on edge points in the heel and toe cap, and obtains the edge points nearest from curve extreme point as feature points. The other edge points are matched using the average length. An experiment on sole with binocular 3D measurement method shows that adding source in the middle of sole can make the object edge clear, convenient for edge extraction. The 3D edge line of the sole feature obtained by the above matching algorithm is complete and correct, mismatching is restrained effectively.

Key words: binocular stereo vision, edge stereo matching, three type fitting；extreme constraint, light source