Three-dimensional expression animation editing method and system based on double-branch network

The invention belongs to the technical field of animation editing, and provides a three-dimensional expression animation editing method and system based on a double-branch network, and the technical scheme is as follows: a high-frequency region division module automatically recognizes a facial high-frequency region by using curvature and a K-Means clustering algorithm improved based on a new spatio-temporal correlation criterion, and improves the rationality and accuracy of region division; the rough editing branch network is used for editing a whole facial grid to generate basic expressions, the fine editing branch network is used for editing a facial high-frequency area to perfect expression details, and the rough editing branch network and the fine editing branch network are combined, so that the expression editing precision is ensured, and the operation efficiency of the model is also ensured. The introduction of the spatial variation convolution enables the two branch editing networks to directly extract