Based On The Expression Of The Sample Generation Study

Example-Based Expression Analogy can be defined as: given an neutral expression image and its another expression image, expression blending retargets the sample's expression motion data to another neutral expression image and gets its another expression image.My work, example-based expression analogy, mainly including human face modeling, expression transformation, texture mapping, is of significance to purse further study on expression morph. Moreover, expression blending plays an important part in Intelligent Human-Computer Interaction, Computer Animation and Comics, entertainment and so on.The work presented in this paper is as follows.Firstly, I choose CANDIDE-3 triangle mesh as standard face model. With the aid of graphic toolkit OpenGL's picking method, I move every vertex of CANDIDE-3 triangle mesh combining with the procedure of 2D facial modeling through Human-Computer Interaction. I get a triangle mesh of the target face model matching his face picture finally.Secondly, after preprocessing the example face triangle mesh, I suggest a new expression blending algorithm based on the example model's facial expression. It calculates the expression motion data of sample model and retargets it to the target model's facial triangle mesh. And then, I adjust the triangle mesh of target face model based on two hypothesizes—every mesh vertex has its own motion zone and the human face is symmetric.Thirdly, so as to apply textures to target model's facial triangle mesh, I put forth my image morphing algorithm based on OpenGL texture mapping technology. On the basis of target model's neutral facial image, its triangle mesh of its neutral facial image, and its another expression triangle mesh, I can get target model's anther facial expression which is vivid and anti-aliasing.Finally, reference to every step of my expression blending method I do some experiments step by step to verify the validation of my algorithm.