图像相似度检测，下面是直方图相交的代码，同种图片的识别率达90％以上，性能非常稳定。 程序的例子是8位（256色）位图，其他位图类似.-Image similarity detection, the following code histogram intersect the same kind of picture identification rate of 90 , performance is very stable. Examples of the program is 8-bit (