Using Dirichlet Free-Form Deformations to Realize Three Dimensional Person Face and Its Distortion
Yuanfa Yang · Computer Technology and Development · 2006
The human face is the important channel which the humanity exchanges mutually.It is the complex expression and the language carrier of humanity happiness,the anger,the sorrow,and so on.Therefore,construction and animation of realistic human facial models is an important research field in the computer graphics.How to produce facial expression of person with sense of reality and movement on three-dimensional facial models of people,it is a difficult point of one of them.So introduced one kind of algorithm based on Delaunay and Dirichlet/ Voronoi diagrams that is Dirichlet free-form deformations algorithm(DFFD) solve this problem.Introduced DFFD technology in the article in detail,according to MPEG-4's face definition parameters,emploied DFFD carry on to common people deformations.Put forward while carrying on the faces of people out of shape utilizing face definition parameter FDP and facial animation parameter method that FAP control by different level at the same time.The establishment controlled in this kind of control point of two grades,make three-dimensional facial models of people have the smooth deformations,therefore it can show various expressions of faces of people smoothly and accurately.