[Digikam-devel] [digikam] [Bug 312551] showFoto displays camera jpegs with AdobeRGB DCF information with a blue color cast

Elle Stone l.elle.stone at gmail.com
Tue Aug 20 17:36:23 BST 2013


--- Comment #4 from Elle Stone <l.elle.stone at gmail.com> ---
It seems that digiKam/Showfoto properly reads the embedded metadata to detect
that the image is supposed to be in the Adobe color space. The problem seems to
be that digiKam/Showfoto then assigns this color space profile:
/usr/share/apps/libkdcraw/profiles/adobergb.icm. That adobe profile is
defective. It uses non-adapted primaries (http://brucelindbloom.com/ - read
down to the section called "Adapted Primaries"). If you assign this defective
adobe profile to a solid white jpeg (see attached solid white test jpeg), the
jpeg will turn blue-green.

Two other profiles in the libkdcraw/profiles folder are also defective in the
same way: applergb.icm and srgb.icm both have unadapted primaries and will turn
a solid white jpeg blue-green if assigned.

I replaced the defective adobe profile with the argyllcms "clayrgb" profile
(changing the name), and Showfoto then properly opened a test camera-generated
jpeg that was saved in the adobe color space.

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