Interactive three-dimensional human face expression animation editing method and system and extension method

Abstract

The invention discloses an interactive three-dimensional human face expression animation editing method and system and an extension method. The three-dimensional human face expression animation editing method comprises the following steps: mapping a two-dimensional control point pixel of a human face model freely appointed by a user and moved to an expected position to a three-dimensional space, so as to obtain a three-dimensional control point corresponding to the human face model; establishing a deformation model of deformation of the three-dimensional control point, caused by editing operation of the user; calculating a correlation coefficient between each vertex and the three-dimensional control point on the human face model respectively; dividing the human face model into different dynamic regions according to the correlation coefficient, wherein each dynamic region comprises one three-dimensional control point; constructing a contribution chart of the three-dimensional control points; carrying out deformation fusion on the dynamic regions according to the contribution chart and the deformation model; finally, obtaining the overall deformation of the human face model. The three-dimensional human face expression animation editing method has the advantages that the calculation is simple, and the deformation of each dynamic region can meet the requirements of users and is also accurate and natural.

Description

technical field [0001] The invention belongs to the field of computer graphics, and in particular relates to an interactive three-dimensional facial expression animation editing method, system and extension method. Background technique [0002] In recent years, 3D facial expression animation has been widely used in various fields, such as expression generation of virtual characters in animation, games and movies; remote network conferences, virtual character animation in virtual reality; medical cosmetology, face recognition Expression simulation; virtual teachers in auxiliary education, virtual hosts and virtual idols in entertainment programs, etc. [0003] With the wide application of 3D facial expression animation, how to provide users with a simple and convenient interactive editing tool, and make the facial expression animation generated by editing be realistic and natural has become a research hotspot and difficult problem generally concerned by the academic and indus...

AI Technical Summary

Problems solved by technology

However, it is challenging to implement such an interactive expression editing tool because: 1) The face model edited by the user often has thousands or even tens of thousands of vertices, while the number of vertices and curves of the model controlled by the user is only A few at most a dozen, using such low-dimensional control elements to control the deformation of high-dimensional models will lead to under-constraint problems, making the generated expressions unnatural or even wrong

2) Due to lack of experience or low professional level, the interactive editing of the control elements of the face model by some users may be inappropriate or even wrong. This inappropriate or wrong input often directly leads to unnatural or even is weird, and thus cannot achieve the editing effect that the user expects

But these methods require a lot of offline processing and calculation

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