用于计算相机外参数，即CCD像素坐标与三维世界坐标的对应关系，输入参数是世界坐标标定点对，输出外参数矩阵-Outside the parameters used to calculate the camera, that the correspondence between CCD pixel coordinates and the coordinates of the three-dimensional world, the world coordinate input parameter calibration point right, outside the parameters of the output matrix