适用于初学者学习的，对图像中直线进行检测，利用opencv库的相关函数-it is a source code for line fit

二维直线拟合，首先假设直线周围有一些2D噪声点，然后增加一些和直线无关的随机点，最后将这些点拟合成直线并显示出来。-Dimensional linear fitting, first assumed linear 2D noise around some point, and then add some random and unrelated straight points, the last of these points were fitted to a straight line and