Multi-three-dimensional grid model interpolation method based on progressive interpolation subdivision curved surface

The invention discloses a multi-three-dimensional grid model interpolation method based on a progressive interpolation subdivision curved surface, and the method comprises the steps: giving n three-dimensional grid models with the same topological structure as key frames, and obtaining dihedral angles and side length data matrixes D of all key frames; reducing the matrix D to two dimensions by using a local linear embedding dimension reduction method to obtain a set d of n two-dimensional points; carrying out Delaunay triangulation on the d after the d is reduced to two dimensions; carrying out Loop surface subdivision based on progressive interpolation on a surface obtained through subdivision; enabling a user to select any number of points on the subdivided curved surface through a designed interface of the interactive system, and enabling the interactive system to generate a cubic B spline curve passing through the points according to the points selected by the user; and sampling the cubic B spline curve t