本文中在构造关键点的对应时定义了难度D,以反映这种选择的变形效果的优劣。计算难度D时, 引入了B样条和曲率K等数学工具, 使难度值D较合理, 变形效果平滑,程序量约5000 行C 源代码行, 在本文后面给出了实际运行的结果,并对算法的时间代价和适用范围进行了分析。-The key point in constructing this article, the corresponding definition of the degree of difficulty when the D, to reflect the effect of such a choice of deformation of the advantages and disadvantages. The difficulty of calculating D, the introduction of the B-spline and the curvature K and other mathematical tools to make a more reasonable difficulty value of D, deformation effects of smoothing, the program is about 5000-line C source code line, is given later in this paper the results of actual operation, and costs and the time of the algorithm application were analyzed.