通过对图像中值滤波处理，二值化，边缘查询，找出图像中源所有的边缘像素点，然后利用最小二乘法对这些边缘点进行找圆，计算出圆的坐标和半径。(By means of median filtering, binarization and edge query, all edge pixels in the image source are found, and then the least square method is used to find the circles of these edge points and calculate the coordinates and radius of the circles.)