Hi, I've had some time to sleep on this, and it's slowly been sinking in, I think I understand what's happening and why there's a need for a display profile (I will, however, maintain that it shouldn't change the pixel values or the histogram... and I've noticed that GIMP does the same, unfortunately).
In message <canqv4tvghyg3bofapbv9mw57+0_5h8ac68wdnn5nat2fbru...@mail.gmail.com> on Mon, 4 Feb 2013 22:49:50 +0100, Pascal de Bruijn <[email protected]> said: pmjdebruijn> On Mon, Feb 4, 2013 at 10:45 PM, Artur de Sousa Rocha pmjdebruijn> <[email protected]> wrote: pmjdebruijn> > I'm afraid the "laptop LCD" part might be a clue. Few laptop displays pmjdebruijn> > can deliver the gamut needed. pmjdebruijn> pmjdebruijn> I agree most laptop displays are unsuitable for serious photo processing. But... pmjdebruijn> pmjdebruijn> > The calibration software tries to pmjdebruijn> > preserve the brightness ratios between different levels. If it cannot pmjdebruijn> > by a large margin it will fail in all kinds of ways. That's why I pmjdebruijn> > moved to an external display for photo processing. pmjdebruijn> pmjdebruijn> It should still be possible to get a half-decent profile. Color pmjdebruijn> managing a small gamut display just means you lose detail in very pmjdebruijn> saturated parts of the image. It should not result in significant pmjdebruijn> color shifts. pmjdebruijn> pmjdebruijn> So this might be fixable to an extent. I just had a closer look at the curves of my profile, and there's this noticable upwards "bump" in the darker tone curves, which I assume is the reason I'm seeing the "h-o-r-r-i-b-l-e results" in the darker areas of my pictures (it does correspond to my experience). Just playing with a .png file I generated with a gradient that goes from dark to light, I could see the difference that it made switching between sRGB and system display profile. sRGB looks smoother, nicer, and the darkest area looks darker to my eye... so I'm taking it the calibration wasn't able to properly measure the darker tones... If my issues is fixable to an extent, I'd be happy to try it. Some recommended pointers I can follow. (and yeah, a better screen would, of course, be the better option. I'm looking at shopping as soon as I feel my finances are good enough. In the mean time, it is interesting to try to figure this out ;-)) Cheers, Richard -- Richard Levitte [email protected] http://richard.levitte.org/ "Life is a tremendous celebration - and I'm invited!" -- from a friend's blog, translated from Swedish ------------------------------------------------------------------------------ Free Next-Gen Firewall Hardware Offer Buy your Sophos next-gen firewall before the end March 2013 and get the hardware for free! Learn more. http://p.sf.net/sfu/sophos-d2d-feb _______________________________________________ Darktable-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-users
