学习opencv的随书例程代码，完整的代码，另附有说明-Routines with the book learning opencv code, complete code, attached a note

用opencv实现的边缘检测功能，根据学习opencv一书中的伪码补充和完整后的代码，可以运行-Edge detection with opencv function, according to the pseudo-code complement and complete code after learning opencv book, you can run