Hough变换 该函数用于对检测图像中的平行直线。如果图像中有两条平行的直线，则将这两条平行直线提取出来。 要求目标图像为只有0和255两个灰度值的灰度图像。-Hough transform of the function is used to detect the image of parallel lines. If the image there are two parallel lines, two parallel lines will be extracted. Req