A Human Face Warping Algorithm Based On The Smoothness Of Control Points And Its Implementation On Face Animation

The research on computer graphics and animation has never been halted. On contrary, as the show business plays a more and more important role in people's daily life, the techniques of computer graphics and animation have been developed rapidly. At the same time, the multimedia techniques are rising, and the computer cartoon animation is popular around the world. Computer warping technique has played a very important role in this.In our paper, we proposed a rapid and well-performed warping algorithm base the project of cartoon human face animation. The algorithm can be applied into the generation of cartoon portrait and the face animation.(1) We proposed a new algorithm in 2D face warping based on the smoothness of the control points. The algorithm combined two common image warping methods with the characteristic of human face. Firstly it had the distribution of the feature points smoothed according to the principle of Thin-Plate Spline (TPS). Then the mesh warping was applied. The outcomes had highly encouraging effects and took little time. And the experiments results showed that it performed very well.(2) We modified the algorithm to adopt the local warping. The control points of the warping parts were set as the subset of the control points in the Thin-Plate Spline transform. Then it not only make the warping parts transformed well, but also simulated the effects of surrounding areas of the warping parts.(3) Applied the smoothness algorithm to the cartoon portraits generation and the face animation. In the cartoon portraits generation based on characteristic transform, the algorithm can be used to warp the texture as soon as the shape was determined. In the face animation, the key frames were interpolated to acquire the middle frames, and the smoothness warping algorithm worked here to make the animation vivid. It played a more important role in the emotional talking head.