[Digikam-devel] JPEG2000 support...

[Gilles Caulier]

On Friday 01 December 2006 15:52, Hubert Figuiere wrote:
> Gilles Caulier wrote:
> > On Wednesday 29 November 2006 12:47, Fabien wrote:
> >> Hm, great!
> >> Is there any digital camera with native jpeg2000 support ?
> >
> > I think no. Perhaps in the future.. To have take a look into Jasper
> > source code, i have seen that encoding algorithm require a lots of CPU
> > ressources. In fact more than JPEG.
> >
> > I suspect 2 problems with JPEG 2000 algorithm :
> >
> > - it require high CPU speed.
> > - The gain with low compression ratio is not sugnifiant than JPEG
> >
> > This is why camera do not use it actually. Perhaps in the future the
> > embeded CPU used in DSC will be more powerfull for that.
>
> You also forget that JPEG2000 is known to be patent encumbered, unlike
> JPEG.

Right. But how Jasper project drive patent issues. This library is distributed 
under MIT license. Duing JPEG2000 patents, there is a risk to use this 
library in a GPL project like digiKam ?

There is also an alternative to Jasper distributed under BSD license : 
http://www.openjpeg.org

Gilles