Given a transformation matrix T, which maps objects (x,y) to the image (x',y'). The inverse of T will map the image back to the object. Just wondering, what happens if matrix T is singular i.e. det(T)=0? Then there is no matrix to map the images back to the object. My teacher said that he thinks a transformation matrix will never be singular, but he wasnt 100% sure, so im just wanting to confirm. Thanks, Dan.