[XviD-devel] Cartoon mode

[Christoph Lampert]

On Thu, 17 Apr 2003, Radek Czyz wrote:

> > I'm
> > still wondering why Qpel is sometimes worse and often better than halfpel. I
> > have an idea and I'm currently investigating this.
> 
> I came up with an answer recently, when I was playing with my LOTR
> DVD. It turns out that qpel can help - really help - when the image is
> sharp, while it doesn't help when the image is blurry.

Which raises new questions: Is this because Qpel ME is bad for smooth
images, or because QPel's Halfpel interpolation doesn't smooth the image
as much as Halfpel's? Or really a Qpel-Problem? 

Or maybe neither, and Qpel _is_ good, but Halfpel is good already
(good "enough"), so Qpel's longer vectors kick in? But then of course,
only filesize should increase, PSNR shouldn't change.


gruel