Realization method of mouth movement of 3D virtual human

Abstract

The invention discloses a three-dimensional virtual human mouth movement implementing method. The three-dimensional virtual human mouth movement implementing method is used for solving the technical problem that virtual human mouth movement is rough in an existing virtual human mouth movement control method. According to the technical scheme, the three-dimensional virtual human mouth movement implementing method includes the steps that firstly, a three-dimensional face grid data model is obtained; then feature points are selected from the mouth area of the model to serve as movement control points according to the movement characteristic of the mouth; finally, a flexible four-rod mechanism model is adopted, the points of the mouth area are regarded as one point on a driven rod, the rotation angular speed of a crankshaft serves as a control parameter, the rotation angle of the points of the mouth area is obtained according to input parameters such as the position relation of a machine frame, the crankshaft, a connecting rod and a rocker, the initial installing position of the crankshaft, and the rotation angular speed of the crankshaft, then the grid points in the mouth area are driven to move, the actual mouth movement is simulated, and over stretching of the boundary is eliminated by processing top points in a top point buffer area. More abundant detailed mouth moment is achieved by adjusting the position relation of a flexible space mechanism.

Description

technical field [0001] The invention relates to a method for realizing mouth movement of a virtual human, in particular to a method for realizing mouth movement of a three-dimensional virtual human. Background technique [0002] 3D face animation is an important research content in the field of computer 3D animation technology. Realistic 3D face animation is widely used in human-computer interaction and video conferencing. As the main organ of human language communication, the mouth is Information transmission and emotional communication play an irreplaceable role. Whether the mouth movement has a sense of reality is crucial to the quality of facial animation, so the research on mouth movement is of great significance. [0003] Waters first used the muscle model to generate facial expression animation, and controlled the movement of the mouth by controlling the contraction of the muscles. However, due to the complexity of the mouth muscles, the model could not achieve precis...

AI Technical Summary

Problems solved by technology

This method can better realize the opening and closing movement of the mouth under normal conditions, but due to the limitation of the swing guide mechanism model, the number of motion control parameters is limited, and the movement law is single, so it cannot simulate the opening and closing movement of various mouths; and The opening and closing of the human mouth is not a simple rigid movement. This model cannot reflect the flexibility and nonlinear characteristics of the mouth movement, and cannot achieve delicate mouth movements.

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