I have a new job in image processing and just earned my BS in Physics. I know enough to make a lot of mistakes...
I have been reviewing my linear algebra a lot lately, especially the affine transformation matrix.
Suppose I have a rotation matrix R = [ cos(a) sin(a) 0 ; -sin(a) cos(a) 0 ; 0 0 1 ]
I know that I can rotate another 3x3 matrix but how is an image with, 100x100 elements, get this rotation applied ?
I have seen one person's idea, which is to use interpolation from reference points....that isn't very elegant.
I have looked into the code I use everyday, and see what I think is the application of the convolution theorem on K space...pretty complicated.
I am looking forward to your replies ! TIA, wbg