Stereoscopic vision three-dimensional displacement measurement method based on structure surface gray features

The invention relates to a stereoscopic vision three-dimensional displacement measurement method based on structure surface gray features. The invention relates to the technical field of structure measurement, and aims to solve problems that artificial targets are arranged in a visual measurement process in a limited manner, and an existing target-free method is general in measurement effect whenthe surface features of a structure are not obvious. A stereoscopic vision system is adopted to perform image acquisition on the structure surface in the moving process to obtain left and right imagesequences; areas of interest and search subareas of the left and right images are selected, and the search subareas are divided into division subareas; binarization processing is performed on the areaof interest and the divided sub-area images; a representative value histogram is established and matched to obtain a coarse positioning matching result; a binary image is established and is matched to obtain an integer pixel m