A facial expression cloning method and device for realizing real-time interaction with a virtual character

Abstract

The invention discloses an expression cloning method and device capable of realizing real-time interaction with a virtual character and belongs to the fields such as computer graphics and virtual reality. The method includes the following steps that: 1, modeling and skeleton binding are performed on the virtual character; 2, the basic expression base of the virtual character is established; 3, expression input training is carried out: the maximum displacement of facial feature points under each basic expression is recorded; 4, expression tracking is carried out: the facial expression change of a real person is recorded through motion capture equipment, and the weights of the basic expressions are obtained through calculation; 5, expression mapping is carried out: the obtained weights of the basic expressions are transferred to the virtual character in real time, and rotation interpolation is performed on corresponding skeletons; and the real-time rendering output of the expression of the virtual character is carried out. With the method adopted, the expression of the virtual character can be synthesized rapidly, stably and vividly, so that the virtual character can perform expression interaction with the real person stably in real time.

Description

technical field [0001] The invention relates to the fields of computer graphics and virtual reality, in particular, an expression cloning method and device capable of real-time interaction with virtual characters. Background technique [0002] With the continuous development of virtual reality technology, virtual character animation is often used in many important fields such as animation, film and television, games, etc., especially entertainment games that require human-computer interaction. The animation of virtual characters includes body animation and facial expression animation. In order to realize the realistic effect of virtual characters, pure body animation can no longer meet the needs of users. Realistic facial animation is an important factor to improve user experience. [0003] Expression cloning refers to reappearing real expressions into virtual characters in real time, so as to achieve the purpose of interacting with virtual characters. Fast, stable, and rea...

AI Technical Summary

Problems solved by technology

[0005] Fusion deformation is a method based on skin mesh deformation. Based on the basic expression and the corresponding weight, the new spatial position of each point is obtained by adding the weight to the spatial position of the grid vertices. The mesh involved in this method Too many vertices, too much computation

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