读入图像,对图像进行预处理,随后检测边缘,对得到的图像进行二值化,然后进行hough变换,获得圆边界,将此图与原图叠加,增强边缘-Read in the image, the image pre-processing, followed by edge detection, binarization on the image to get, and then the hough transform to obtain the circular boundary, this map and the original image overlay to enhance the edge