OpenCV:奇怪的旋转和翻译矩阵。

I am trying to solve a plane2plane projection problem using the findHomography function found in the OpenCV library. As a toy example I have a set of points in R2, P, and a second set of points in R2, Q, where Qx = Px+50, Qy = Py. Meaning I've offset the x-coordinates by 50. Now I run the following code:I am trying to solve a plane2plane projection p