中文说明：读取图像中，图像预处理中，其次是边缘检测、 二值化图像，得到，对然后 hough 变换提取圆形边界，这张地图和原始图像覆盖，增强优势
English Description：
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