跟上个版本不同的是，去掉了判断是不是椭圆的代码。这样拟合的 二次曲线就不同了。读者可以自己一些判断，来拟合不同的曲线。 我只提供一个思路。程序写的不好，请多指教。-Keep up with the different versions is that the removal of the judge is elliptical rather than code. This quadratic curve fitting is different. Some readers can jud