[Digikam-devel] JPEG2000 support...

Gilles Caulier caulier.gilles at kdemail.net
Wed Nov 29 11:12:35 GMT 2006

Hi all,

Yesterday, i have playing with libjasper API :


... into digiKam core to add support of JPEG2000 file format :


There is a patch against svn to add a new JPEG2000 image loader :


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 :


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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