这是一个用C++编译的程序，可以实现用，以供大家学习交流之用图像处理算法-This is a C++ compiler to use the procedure, you can achieve using Canny edge extraction operator for the exchange of U.S. study purposes.

PDD划线算法，运用了计算机图形学的课本，来自己写的一个小程序，小算法，希望大家不要嘲笑。(PDD scribing algorithm, the use of computer graphics textbooks, to write a small program, small algorithm, I hope you don't laugh at.)