It’s basically resistant to dirt, so there’s no reason to overclean it.”

A homography on a real projective plane can be specified by a mapping from one set of four non-collinear points to another set of four non-collinear points. Given such a specification, then the 3-by-3 homography matrix may be computed by means of the DLT (Direct Linear Transformation) algorithm.

I'm more skeeved out that he went in your room.

The ear-to-the-ground President knew that all the unrest could not be blamed on Communists.