Hough变换时一种检测、定位直线和解析曲线的有效方法。他是把二值图变换到Hough参数空间，在参数空间用极值点的检测来完成目标检测,Hough transform of a test line positioning and effective way to resolve curve. He is the binary image to the Hough transform parameter space, parameter space used in the detection of extreme points to complete the target detection