A guth fracture identification robust enhancement and three-dimensional positioning method

Abstract

The present application relates to computer vision, image recognition and three-dimensional reconstruction technical field, specifically to a kind of ancient tower crack identification robust enhancement and three-dimensional positioning method.The method obtains the multi-view image of ancient tower surface, carries out multi-scale feature coding to each image, constructs slowly varying illumination field, weathering texture field, high-frequency noise field and linear structure candidate field, according to original image reconstruction constraint separation degradation component and generates structure preservation image;Crack center line, endpoint, branch point and width sequence are extracted to establish crack topology, according to topological conservation feedback partition adjustment light correction, texture suppression and detail recovery intensity, obtain robust enhancement image;Based on multi-view stable crack topology correspondence relationship, the three-dimensional coordinates of crack are obtained.The present application can inhibit pseudo-crack formed by masonry joint, weathering texture, shadow and noise, maintain crack connectivity and width variation, reduce two-dimensional identification deviation transmission to three-dimensional positioning, improve the stability of crack spatial positioning.

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