Online Evaluation Platform Of Non-rigid Correspondences Of 3D Geometric Models

Correspondence of 3D geometric models is an important research content in computer graphics.But the existing descriptors in isometric registration based on function mapping are mainly limited to point features.The coverage in the evaluation index of the three-dimensional model registration algorithm will be incorrect due to the unevenness of the vertex used in the calculation.The management of model files in the existing 3D model library is not systematic enough,and the model viewing is not convenient enough.At the same time,there is no special online platform to display the results of 3D model registration and the evaluation of registration results.Aiming at the above problems,proposes a function mapping algorithm based on curve constraints,and a three-dimensional model registration evaluation index of the model vertex Voronoi area ratio and the triangular mesh area ratio,then based on the Web GL framework Three.js and Java Web technology,an online evaluation platform of nonrigid correspondences of 3D geometric models was established.The main contents include:(1)A functional maps algorithm based on line constraint is proposed.Firstly,the feature points are obtained based on thermonuclear features on the registration model.Secondly,an equidistant transformation invariant feature curve is constructed between the feature points.Then descriptor for calculating characteristic curves.Use the descriptor function of the characteristic curve as a constraint to solve the functional map matrix.Finally,Finally,convert the function map to point-to-point matching.Compared with the previous algorithm,the algorithm proposed in the paper can get better registration results.(2)Among the existing evaluation indicators,the coverage is calculated based on the number of corresponding vertices on the model obtained by registration,but the coverage is not accurate enough because the vertices are not uniformly used,improved it and uses the area ratio of the model vertex Voronoi area to calculate the coverage.A new evaluation index based on the model triangle mesh area ratio was also proposed.(3)Combining Web GL technology with Java Web technology and database technology to build an online evaluation platform of non-rigid correspondences of 3D geometric models.Requirement analysis and functional design of the platform were implemented,the database was used to manage the 3D model files,and online display of 3D models,model registration results,and registration evaluation results was achieved,in the platform,the evaluation indexes in the paper are used to compare and demonstrate the curve-constrained function mapping algorithm with other algorithms.