[Digikam-users] editing with Color Management enabled is very slow?
efelthauser at gmail.com
Sat Mar 23 00:59:50 GMT 2013
Thanks for your response. See my comments interspersed:
On Fri, Mar 22, 2013 at 4:25 PM, Marcel Wiesweg <marcel.wiesweg at gmx.de>wrote:
> Digikam's color management was written when there was no KDE-wide support,
> support in KWin or the graphics stack. It reads the monitor profile from
> old-style XAtom, but then the internal configuration option will be greyed
Not sure what you mean by "internal config option will be greyed out"...No
option in digiKam is greyed out for me...
> I suspect double correction if you set the profile in both places.
Then, do you know: If I turn off CM in digiKam, does digiKam show pics with
corrected colors for monitor, thanks to KDE color manager?
Also, I shoot in sRGB, so I guess it is not a worry about the working
space?? But for someone shooting AdobeRGB, then they DO need to use digiKam
internal CM, right, to ensure conversion for working space?
> digikam uses lcms and computes color correction on the CPU. I have a weaker
> machine and experience only very short delays if I set a monitor profile
> the sRGB. It probably scales linearly with image size. I do not know if
own monitor profile is very cost intensive to use, you could try another for
Is your "other profile" a custom one? I noticed that the non-custom
profiles that appear in my /home/erik/.local/share/icc/ are about 1KB only.
However, the one I created with ColorHug is 24KB. Perhaps it is TOO "High
Quality". Maybe I can make a lesser-quality one, that requires less CPU?
I do know that if I use the default manufacturer one (don't know where it
came from -- maybe ColorHug live CD or digiKam downloaded it?), which is
only about 1KB, it is less slow, but still not great. Takes maybe half as
long compared to custom profile.
I guess I may try to run ColorHug again, but it sounds like I am not the
only one with the problem...
> Just to be sure, you turn and off CM in digikam and experience the
> differences, while system CM is constantly turned on?
That is correct.
> Digikam-users mailing list
> Digikam-users at kde.org
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