Texture synthesis-based model hole-filling method

Abstract

The invention discloses a texture synthesis-based model repairing method. The method comprises the steps of firstly, selecting a hole-containing triangular grid model with textures as an input, repairing a hole of the input model by use of a conventional method without considering texture information, and performing smoothing processing; secondly, separating a characteristic displacement vector asmatched marking information by use of a multi-resolution technology; thirdly, performing parameterization on a smoothed base curved surface grid to obtain a two-dimensional plane, and completing sampling of each vertex in a parameterized plane to obtain a sample block set composed of vertex sampling regions; fourthly, searching an optimal matching sample block of a to-be-repaired sample block, adding new texture information of the vertexes to the base curved surface grid, and sequentially updating the vertex information in the to-be-repaired region in a manner similar to a screw type; and finally, adding a constraint condition according to the updated grid vertex information to solve a linear equation set, and reversely solving a new coordinate of the vertex to complete reconstruction ofa target grid. Therefore, the problem of missing of texture characteristics after repairing of the hole-containing triangular grid model with the textures is solved.

Description

technical field [0001] The invention belongs to the technical field of three-dimensional digital geometry processing, and in particular relates to a grid model repairing method. Background technique [0002] The hole repair of the mesh model is one of the three-dimensional digital geometry processing technologies. Factors such as three-dimensional scanning measurement equipment, measurement methods and human errors lead to the loss of model data. After point cloud preprocessing or triangulation, incomplete surface defects are formed. The formation of holes affects the visual effect of 3D models and post-geometry processing, such as surface modeling and editing, and the development of model repair technology also provides new means and tools for cultural relics preservation and research. The main research methods of hole repair include radial basis function method, diffusion method, B-spline curve interpolation method, template deformation method, etc., and hole repair itself...

AI Technical Summary

Problems solved by technology

Because most of the actual textures have rough surface geometry, image texture synthesis technology can no longer simply satisfy the synthesis of 3D textures; most researches focus on the theory and method improvement of image texture and geometric texture synthesis, such as choosing different Geometric texture synthesis method or adjust the sample matching criteria to improve the algorithm, but the synthesis effect of geometric texture details is not ideal

[0004] To sum up, since the existing mesh model hole repair methods still have problems such as low accuracy and the incomplete repair of the original geometric texture details of the model, it is necessary to propose a new solution for holes in textured mesh models.

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