在各种图形中，通过提取点的凹凸部分来鉴别曲线的特征，本节代码利用曲率关系分别提取凹点的个数，判断曲线的弯曲-In a variety of graphics, through the extraction point to identify curves convex-concave part of the characteristics of the code used in this section were extracted from concave curvature of the r

根据傅里叶描述子进行轮廓匹配，开发环境：matlab ，解压放到matlab中即可使用-Contour matching based on Fourier descr iptors, the development environment: matlab, unzip into matlab in to use! !