Detecting garbage homographies from findHomography in OpenCV?

Question

I\'m using findHomography on a list of points and sending the result to warpPerspective.

The problem is that sometimes the result is comple

Answer 1

But this depends on the point-correspondences you use to compute the homography... Just think that you are trying to find a transformation that maps lines to lines (from one plane to another), so not any possible configuration of point-correspondences will give you an homography that creates nice images. It is even possible that the homography maps some of the points to the infinity.