heya,
for colour management to work, both input and output (or display for that
matter) profiles are important. if you have no idea what you're doing,
don't touch the input profile (maybe double check that it's set to
something like standard matrix or enhanced matrix for raw and srgb for jpg)
and leave display/output at srgb.
maybe this would be a good starting point to read up on colour management:
https://encrypted.pcode.nl/blog/page/2/
-jo
On Wed, Nov 12, 2014 at 1:48 PM, Rob Z. Smith <[email protected]> wrote:
> Colour space (commonly SRGB or Adobe RGB). This essentially defines the
> ‘universe’ of available colours, changing this should have no visible
> effect on how colours are rendered unless you are talking about extremely
> saturated marginal colours that can’t be represented in all colour spaces -
> however If you have an image in one colour space e.g. Adobe don’t expect
> it to look quite right if your software thinks it is in something
> different such as SRGB . Adobe RBG and SRGB are fairly similar so a
> mismatch isn’t too bad and results just in some fairly subtle rendering
> differences but if you have a mismatch between two exotic and very
> different colour spaces then expect psychedelics.
>
>
>
> Input profile – corrects for non-linearities in your camera or other
> source and is generally not needed
>
>
>
> Output profile – corrects for non-linearities in your display,
> printer/ink/paper combination, or other output device and is generally
> essential
>
>
>
> Rgds,
>
> Rob.
>
>
>
> *From:* Petr Vorel [mailto:[email protected]]
> *Sent:* 12 November 2014 11:32
> *To:* darktable-users
> *Subject:* Re: [Darktable-users] Color management, LUT and swapped matrix
>
>
>
> The input color profile has such a strong effect because it basically
> changes how the colors are represented, interpreted, it's the option you
> should use to correct for color disbalancies from your camera. I haven't
> found yet any use for output profile. It sets how the colors are displayed
> - I choose either sRGB or very rarely Adobe RBG if I like the look.
>
>
>
> On 12 November 2014 12:22, Petr Vorel <[email protected]> wrote:
>
> I believe that raw has no color profile set so it is up to the software
> to apply one.
>
> The settings of color profile in-camera apply only to jpegs.
>
> Also I wouldn't use cLUT with darktable. The colors are off as the profile
> is not applied correctly. You can try to compare with Photoshop applied
> profile, or Digikam if you happen to be using Linux.
>
>
>
> On 12 November 2014 08:47, ternaryd <[email protected]> wrote:
>
> On Tue, 11 Nov 2014 11:08:02 +0100
> "Michael Below" <[email protected]> wrote:
>
> > AFAIK Argyll and LittleCMS are different parts of
> > the color management system, not competitors.
> > Try enabling LittleCMS.
>
> I wonder, what each might be responsible for.
>
> In the meanwhile, I don't have a profile with
> swapped matrix anymore. Nevertheless I did this but
> couldn't notice any visual difference. Then, I saw,
> that among the modules the input/output profiles,
> and those definitively did make a difference,
> although I'm not yet sure if to better.
>
> My camera allows me to select one of two color
> spaces: sRGB and Adobe RGB. The current setting can
> be found also in Exif.Photo.ColorSpace. First I was
> wondering, why darktable doesn't use this
> information. But then I thought, as the images from
> the camera are raw+jpeg, darktable would use raw,
> and for that, the color space can be changed out of
> camera. Is this correct? Why would an input profile
> then make such a strongly visible difference
> keeping the output color space the same?
>
> Thanks,
>
> --
> Cris
>
>
>
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