依据极线几何原理，用opencv实现对两幅图像检测特征点后计算基本矩阵。在其中任意一幅图像中选点，在另一幅图中显示极点和极线。-Based on the principles of epipolar geometry, with opencv after two images to detect feature points to calculate the basic matrix. In either an image point, poles and lines displayed in