[Digikam-devel] JPEG2000 support...

[Caulier Gilles]

Le lundi 18 décembre 2006 20:30, Gerhard Kulzer a écrit :
> Am Mittwoch, 29. November 2006 12:12 schrieb Gilles Caulier:
> > Hi all,
> >
> > Yesterday, i have playing with libjasper API :
> >
> > http://www.ece.uvic.ca/~mdadams/jasper
> >
> > ... into digiKam core to add support of JPEG2000 file format :
> >
> > http://en.wikipedia.org/wiki/JPEG_2000
> >
> > There is a patch against svn to add a new JPEG2000 image loader :
> >
> > http://digikam3rdparty.free.fr/misc.tarballs/jpeg2000.patch
> >
> > You need to have libjasper developement package installed on your
> > computer. In all case, this patch will be applied later than digiKam
> > 0.9.0 final release.
> >
> > Against JPEG, JPEG2000 features are :
> >
> > - 16 bits color depth (JPEG : 8 bits only)
> > - Alpha channel support (JPEG no)
> > - LossLess compression availalble (JPEG no)
> > - Better compression ratio than JPEG, especially with high compression.
> > - Better image quality than JPEG, especially with high compression.
> >
> > There are some comparaison web sites available, for example this one :
> >
> > http://www.geocities.com/ee00224/btp2.html
> >
> > JPEG 2000 support EXIF and XMP metadata. I hope than JPEG2000 can be
> > added to the picture file format supported by Exiv2 library.
> >
> > Andreas, can you give me your viewpoint about it ?
> >
> > Gilles Caulier
> >
> > _______________________________________________
> > Digikam-devel mailing list
> > Digikam-devel at kde.org
> > https://mail.kde.org/mailman/listinfo/digikam-devel
>
> Just found another article on JPEG2000 comparison:
> http://www.photozone.de/7Digital/jpeg2000.htm

Thanks for the url. Very instructive.

Tomorrow, i will polish my JPEG2000 support patch and commit it to svn, like 
this you can play with it during hollidays...

Gilles