Expression animation redirection method and system based on grid deformation

Abstract

The invention discloses an expression animation redirection method and system based on grid deformation. The method comprises the steps that front face color and depth image information is acquired; feature point positioning is carried out on the front face color image, and image coordinate information corresponding to a low-level vertex of a face standard model is determined; a corresponding relationship between a color image coordinate system and a standard face model coordinate system is established, and a two-dimensional image coordinate corresponding to a middle-level vertex of the standard face model is solved according to a Sibson local coordinate corresponding relationship between the low-level vertex and the middle-level vertex; three-dimensional position information of the vertexof the middle level under a model coordinate system is obtained; the standard face model is deformed by taking the vertex of the middle level as a control vertex of grid deformation to generate a characterized three-dimensional face model; and the construction of a three-dimensional face model is completed through texture mapping. According to the method, the modeling efficiency is improved, andmeanwhile, the sense of reality of the simulated face is ensured through the innovatively proposed grid deformation method.

Description

technical field [0001] The invention relates to the technical field of expression simulation, in particular to an expression animation redirection method and system based on grid deformation. Background technique [0002] 3D face modeling technology has always been a hot research topic in the fields of computer graphics and computer vision, and has been widely used in many fields such as game entertainment, film and television animation, public security, medical technology, etc. Therefore, how to synthesize a highly realistic 3D face The face is a goal that researchers are constantly pursuing. In recent years, the Kinect depth camera has been widely used in the field of 3D face modeling due to its low modeling cost. Big. [0003] In order to solve this problem, some scholars have proposed an improved modeling method based on the Kinect camera, which completes 3D face reconstruction by quickly integrating multiple frames of images. However, this improved method requires rel...

AI Technical Summary

Problems solved by technology

However, due to the large amount of point cloud data and the complex calculation of the optimization deformation process, this method cannot effectively guarantee the modeling efficiency.

Images