[Digikam-users] Tutorial: Color Management, Camera Profiles,
paul at waldoware.com
Tue Jun 3 19:33:33 BST 2008
----- "elle stone" <jrle1 at twcny.rr.com> wrote:
> Could you please email me the details of what you do to produce a "CM
> and an "unmanaged image"? I am not sure the issue is "color
> management" per
> se, but I am really curious and willing to see if I can figure out why
> results vary so much.
The first problem I have is with the camera profile. I got profiles from the ufraw site I mentioned. The profiles look great when I convert using UFRaw, but they are very dark when used with digikam.
> I am not so sure that a color-managed workflow will necessarily lead
> to an
> improved image. If your workflow isn't color-managed, then you are
> default working exclusively in sRGB (except for applying the right
> profile, if you are starting with a raw file). Many, many fine
> have been produced in sRGB and many professional photographers start
> the camera jpeg rather than a raw file. Color management becomes an
> if/when you want to step outside of the bounds of sRGB as your working
> output space.
Agreed that sRGB will work OK, especially if the output medium is sRGB. My understanding is that if you work in a larger gamut, for some images you will not see artifacts such as clipping and banding when switching to an sRGB output space. Maybe examples of how that works...?
> Bugzilla from paul at waldoware.com wrote:
> > * Monitor Profiling in Linux
> A very good topic that I'd be happy to try to write up, especially if
> with the newer LCD monitors would speak up about their experiences
> procedures. I'm still using a Sony Trinitron CRT. When I switched
> Linux, being able to calibrate my monitor was my number one
> requirement, and
> to my surprise and delight, Argyll does a better job than the windows
> software I had previously used.
> Color management, per se, might not lead to a better image, but I am
> absolutely positive that using a calibrated monitor will improve your
> images. By the way, profiling and calibrating are two different
> things -
> you will benefit from calibrating your monitor even if you don't
I apologize, I did mean calibration. I use the KDE calibration tool, but I'm open to anything else.
> > * Obtain the Camera Profile. . . . For example,
> > http://staffwww.itn.liu.se/~karlu/div/howto/ufraw_with_canonSLR.php
> > 7
> > profiles available for a single camera. What to choose?
> Thank you for the link! I finally found the elusive Canon Rebel XTI
> profiles! I will definitely write up a little "which Canon profile"
Let me know if you need Rebel images. Thanks !
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