从原四边形四个点和新矩形四个点得到一个变换矩阵，根据这个矩阵再作用到全局图像就可以.因为Matlab细节的原因，我把公式中x和y位置互换了-A transformation matrix according to this matrix is ​ ​ applied to the global image. Because Matlab detail reason, swap x and y position of the formula I obtained from the four points of the original a quadrilateral four points and the new rectangle