Research And Realization On Facial Expression Technology

The study of facial expression technology have a great importance in computer graphics,In daily life, people's facial features provides a wealth of information, It is an important part of emotional expression and identification, through changes in facial expressions, people can judge the mood is good or bad. Due to the development of technology of image deformation,complex operation could be omitted only when establish the model of face,so face expression technology has broad prospects for development.Facial expression technology is mainly divided into three key steps: facial feature points positioning, face the triangulation and parameterization using triangular mesh. firstly, Input a positive face photo, it needs to identify and locate facial feature points, secondly, Using these feature points to construct triangular meshes, finally, doing expression transformation in accordance with the provisions of the MPEG-4 standard. In this paper, the classical ASM algorithm is proposed based on multi resolution feature point positioning algorithm, we analysis respective advantages and disadvantages of the Delaunay triangulation two method(triangulation growth method and the divide method), the paper proposes a new synthesis algorithm implementation process of the grid fast face. Combined with the face model in the MPEG-4 standard, we can achieve different face shapes by expression under the control points of the mobile grid and texture mapping. The experimental results show the true nature of facial expressions, which can meet the requirements of visual sense.