[XviD-devel] lossless rescale

Marco Al xvid-devel@xvid.org
Fri, 2 Aug 2002 10:33:30 +0200


Marco Al wrote:

> I guess it rescales the DCT bases functions before applying the IDCT.
> I think calling that lossless is a bit of a misnomer though ... it will
> probably be better than simple bilinear interpolation because the DCT
> captures the image statistics better, but I dont think its guarantueed to
> be optimal ... in fact I wouldnt be surprised to see ringing artifacts.

Did a quick search on DCT domain resizing and found this link :
http://web.mit.edu/zuohao/www/thesis.pdf

Perceptually I thought it stunk :)

Marco