A method for repairing defects and holes in three-dimensional mesh model based on characteristic lines

Abstract

The invention discloses a method for repairing defects and holes of a three-dimensional mesh model based on characteristic lines, which comprises the following steps: 1) detecting characteristic lines: describing the corresponding principal direction curvature fitting extreme value on the mathematical definition of the characteristic lines on the surface of the three-dimensional mesh model which can represent the prominent geometrical characteristics; 2) matching of characteristic lines: selecting an optimal matching pair through a matching probability measurement standard for the characteristic lines detected in the step 1); 3) triangulation and thinning adjustment: after matching and bridging the characteristic lines, the original hole is partially changed into a plurality of polygonal sub-holes, and the basic surface is constructed; then Delaunay triangulation and edge scoring function are calculated for each polygon sub-hole, and an influence factor is assigned to each edge of thepolygon sub-hole to realize the anisotropic refinement of the mesh and the repair of the damaged area of the hole. The damaged area of the repaired holes can keep the same density with the surroundingtriangular mesh, and can be naturally connected with each other.

Description

technical field [0001] The invention relates to the technical field of computer graphics processing, in particular to a method for repairing defects and holes in a three-dimensional mesh model based on feature lines. Background technique [0002] In recent years, due to the rapid development of AI technology, great achievements have been made in computer vision, and the technical precision is getting higher and higher, which also makes the technical precision and requirement of 3D reconstruction based on sequence images higher and higher. As many problems in the traditional 3D reconstruction representation method based on Non-Uniform Rational B-splines (NURBS) become more and more obvious, the discrete grid representation model has been more and more widely used. The representation and modeling of mesh models has the advantages of high efficiency, arbitrary topology, easy transaction, and adaptability to network transmission, etc., and has gradually become an important basis...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to address the deficiencies of the prior art, and provide a method for repairing defect holes in a three-dimensional mesh model based on feature lines, which can meet the technical accuracy requirements of digital technology for 3D models, and can solve the problem of three-dimensional reconstruction of sequence images After the grid model, the information interference caused by the weak texture, strong highlight, occlusion and other reasons of the sequence image can solve the problem of local defects. Under the premise of similarity, the surface detail feature information of the original model is restored to the maximum extent, and the visual effect after restoration is good, which meets the needs of practical applications

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