最小二乘法圆拟合.编译运行后随便打开一个图片，当然最好是全白的图片，然后就点吧，大于三个点后就会开始拟合。红线画的圆为拟合的圆，深蓝的点为鼠标点击设置的样本点。单击鼠标右键清空样本集。 -least squares fitting round. After running compiler casually open a picture, of course, the best are the white photographs, then on the point bar, more th