另外一种有效的椭圆陪陪技术，对于亚像素边缘检测非常有用的，真的不错-Oval to chat with another kind of effective techniques for sub-pixel edge detection is very useful, really good

基于直接最小二乘法的椭圆拟合程序，比较实用，适用于图像处理，椭圆拟合方面研究的初学者-Direct least square method based on ellipse fitting procedure more practical for image processing, aspects of ellipse fitting for beginners