Hey Marco, could you tell whether and why using bicubic for enlarging and bilinear for reducing is better than using bicubic for both? I was under the impression that bicubic was the highest quality algorithm for all resizing operations.
No, I couldn't. I cannot find any reason based on a clear mathematical proof.
However I'm quite sure that bicubic is not a panacea for all resizing operations. In
http://www.msjc.edu/m2/gall/resampling-nearest&bilinear/resampling.html
is given an example of better results with "Nearest Neighbour" instead of bicubic (because of the image nature).
In
http://www.mav-magazine.com/Apr1999/resample/
is described this bilinear/bicubic option of PSP.
The question is tricky. And I'm very interested in a clear answer. My opinion is that (sometimes) bicubic for reducing smooths the image too much.
Marco _______________________________________________ Gimp-user mailing list [EMAIL PROTECTED] http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-user
