Among other interesting functions, AutoCAD Raster Design has some possibilities to rectify raster images through well-known function Rubbersheet that enables two basic methods of rectification (triangular and polynomial). As far as I remember from my photogrammetry courses there are also other methods to do these things and there is general misunderstanding of theoretical background of two above mentioned as well. So the question is:
- how do these methods work; what are they useful for?
- where do they belong in the wide field of raster data processing?