Abstract: Traditional methods do not determine the key feature points in the process of 3D animation character modeling reconstruction, which results in low matching degree and slow convergence speed of attitude image. Therefore, a 3D animation character modeling reconstruction method based on topology analysis is designed. Topological analysis is used to determine the point, line and face structure of 3D animation character modeling. The edge detection method based on fusion technology is used to extract feature points, and calculate the gradient value and gradient direction of feature points, so as to determine the key feature points and generate the main direction and feature descriptor. On this basis, the descriptor distance of the key points in the corresponding source database is calculated, and the feature points are matched according to the ratio of the minimum distance to the next small distance, and the 3D animation character modeling is reconstructed by interactive geometric constraint deformation. The test results show that the overall matching degree of the designed 3D animation character modeling reconstruction method is above 0.6, which is far higher than the matching degree of traditional reconstruction methods, and the convergence speed of the method is faster, which shows that it is suitable for the 3D animation character modeling reconstruction design.

Key words: topology analysis, three-dimensional, cartoon characters, modeling, reconstruction