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Data driving face expression synthesis method based on Laplace transformation

A technology of Laplace transform and driving face, which is applied in image data processing, animation production, instruments, etc., can solve the problem of not considering the change of three-dimensional facial expression, but only consider the two-dimensional situation, etc., and achieve a friendly interface and results. Robust, algorithmically defined effects

Inactive Publication Date: 2011-01-12
ZHEJIANG UNIV
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Problems solved by technology

However, as the author mentioned in the article, this method does not consider the three-dimensional facial expression changes, only the two-dimensional situation

Method used

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  • Data driving face expression synthesis method based on Laplace transformation
  • Data driving face expression synthesis method based on Laplace transformation
  • Data driving face expression synthesis method based on Laplace transformation

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Embodiment Construction

[0041] A data-driven human facial expression synthesis method based on Laplace transform of the present invention will be described in detail below in conjunction with the accompanying drawings through an implementation example. The present invention can be effectively applied in the graphics card hardware of a home computer.

[0042] Such as figure 1 As shown, a data-driven facial expression synthesis method based on Laplace transform, including collecting the movement of the facial feature parts of the performer, decomposing the captured movement data of the facial feature parts into facial expression movement and head Rigid body movement, load the neutral target face model, calculate the Laplace coordinates of each vertex in the neutral target face model according to the geometric structure and topology of the neutral target face model, and transfer the facial expression movement to On a neutral target face model, transfer the rigid body motion of the head to a target face ...

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Abstract

The invention discloses a data driving face expression synthesis method based on Laplace transformation, comprising the following steps of: resolving face motion data captured after the face motion of a performer is acquired into a face expression motion and a head rigid motion; calculating the Laplace coordinates of each peak in a loaded neutral target face model; moving the face expression motion to the neutral target face model to make the neutral target face model have consistent expressions with the performer; and moving the head rigid motion to the target face model having the consistent expressions with the performer to make the final target face model have consistent face expressions and head postures with the performer. Based on a Laplace transformation technology being capable of keeping the original detail features of the model, the invention keeps the existing detail features on the target face model while realizing the moving of the face expressions, has the advantages of definite arithmetic, friendly interface and robust result and can be conveniently applied to the computer game field, the online chat field and other man-machine interaction fields.

Description

technical field [0001] The invention relates to the technical fields of computer graphics and computer animation, in particular to a data-driven human facial expression synthesis method based on Laplace transform. Background technique [0002] Computer facial expression animation technology can synthesize highly realistic virtual human facial expressions, and it provides a fast and efficient tool for depicting virtual human facial expressions. The facial expression synthesis technology effectively transfers the captured facial expression information to any facial model, thereby synthesizing a variety of realistic facial expressions. In recent years, this technology has been widely used in computer games, online chatting and other fields of human-computer interaction. [0003] The details of facial expressions can greatly improve the realism of facial expression animation, and the real-time 3D scanning system can record the details of facial expressions from multiple levels....

Claims

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Application Information

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IPC IPC(8): G06T13/00
Inventor 万贤美金小刚
Owner ZHEJIANG UNIV
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