调用opencv的cvFindHomography函数求得H矩阵，再利用利用cvInvert求得H的逆矩阵，最后，选取图像上的像素点，利用cvMatMul(Ma, Mb, Mc)求出其结果矩阵。-The cvFindHomography call opencv function matrix H is obtained, and then use use cvInvert determined inverse matrix H, and finally, the pixels on the i