基于hough变换的边缘检测（下面是采用 CANNY 算子进行图像边缘检测的 C/C++ 源代码，在OPENCV BETA 4.0， VC6.0 环境下编译通过-Hough transform based on edge detection (Here is using CANNY operator image edge detection C/C++ source code, under OPENCV BETA 4.0, VC6.0 environment compiler