[Digikam-devel] JPEG2000 support...

[Gerhard Kulzer]

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
>
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Just found another article on JPEG2000 comparison:
http://www.photozone.de/7Digital/jpeg2000.htm

Gerhard

-- 
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