基于特征的图像变形方法(本章所介绍的线对变形方法属于特征的图像变形方法)实质上就是让目标图像上的某个事物的特征具有源图像上与其对应的事物的特征，它是一种运算。-Image warping method) feature-based image deformation method (the line described in this chapter belong to the characteristics of the deformation method is essentially the characteristics of things in the target image on a source image and its corresponding characteristics of things, it is a operations.