数字图像处理第二版源码，虽然是第二版的源码，但是书籍的基本内容没有什么很大的变动，所以源码对于后来的版本均可用，很方便。(Digital image processing second edition source code, although it is the second version of the source code, but the basic content of the book is not much change, so the source code for later