经典的几张图像处理测试图片，整理好的，供大家共享。-The classic test images of several image processing, sorting good for everyone to share

银行等一些特殊部门要对大量的硬币进行高效的处理，如计数、分类、包装等以使其再流通，无人售票车、投币电话等需要对硬币进行实时识别，自动售货机除了识别之外，还要提供找零功能等。而且在目前在世界范围内，硬币以其成本低，流通次数多、耐磨损、易回-Banks and other special departments to the efficient handling of a large number of coins, such as counting, sorting, packaging, etc

opencv使用常用函数整理总结，便于查看-opencv using common sorting function summary for easy viewing