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 into the image, the image preprocessing, edge detection followed, the resulting image binarization, and then hough transform to get round the border, this graph with the original o