On Tue, Jun 25, 2013 at 10:02 PM, Milan Knížek <[email protected]>wrote:
> Julian J. M. píše v St 19. 06. 2013 v 22:09 +0100:
>
> >
> > I tried Gimp, and the image looks the same as in Darktable, when the
> > monitor ICC profile is used. If I select unmanaged in color
> > preferences, I see the same as in Chrome.
> >
> >
> Try to take some JPEG image, which comes from the camera (extract the
> thumbnail from raw without any processing using the exiftool or exiv2;
> or set the camera to produce JPEG files on the SD card), and open it
> with GIMP.
>
> The image colour profile should be sRGB (or AdobeRGB if set so in your
> camera), the display profile should be the "system" one (i.e. those
> created by GCM).
>
I enabled the RAW+JPG mode and took some pictures with different lights and
shadows.
The JPG is using sRGB, and gimp detects the profile automatically (no
difference if I select the ICC file manually), and different than when I
select "no color management".
> How does the image look like? Too light shadows when compared to the
> preview on the back display of the camera?
>
I had the camera brigness set at max (7).. If I set the default (4) the
picture looks practically the same on the camera LCD and the monitor.
>
> And what if you turn off colour management (or set the display profile
> to sRGB)?
>
It's different... some color shift, and minimal brightness change...
nothing like the difference between the screen and the pictures I printed
before, which are way way darker.
I've been doing tests with dispcalGUI, which has way more settings than the
gnome Color settings. It doesn't matter much what target I select (gamma
2.2, gamma 2.4, sRGB, etc)... I notice differences in the desktop
background, but when the program does color management, the images look
always the same (either darktable or gimp).
What's more, if I calibrate each display for a different color space (1 for
standard gamma 2.2, and the other targeting the sRGB color space, which
seems a bit darker), I notice the desktop background is darker on the right
screen.
However, if I open a picture in Darktable, and move the window to another
monitor, after 1 second darktable picks the current monitor profile and
adjusts the colors of the image. They look the same in both monitors, even
when the calibration is different. Great stuff.
I've ordered new pictures from another shop (photobox.es)
I asked them about color management, and they told me they use 2 kind of
printers, "Fuji Frontier minilab" and Poliellectronica printers. The
attached this picture regarding the gammut:
https://www.dropbox.com/s/15415xdl0xotyki/photobox.jpg
What I need to do now, apart from waiting for the pictures, is to get a ICC
profile for the Fuji, and check if softproofing shows something similar to
the paper picture.
BTW, when the dynamic range is different (screen and paper), how is the
conversion done? Does it just clip (low or high) or does it try to adapt it?
Thanks,
Julian.
------------------------------------------------------------------------------
This SF.net email is sponsored by Windows:
Build for Windows Store.
http://p.sf.net/sfu/windows-dev2dev
_______________________________________________
Darktable-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/darktable-users
