Color correction

[Wolfgang Mader]

On Wednesday 11 September 2013 17:37:10 Richard Mortimer wrote:

> On 11/09/2013 17:09, Gilles Caulier wrote:
> > In other, as i just bought a new opensource Colorimeter device for my
> > tux photo-station where i use 2 27' IPS flat screens, I will be
> > interrested to improve multi-screen support in digiKam Color
> > management settings.
> >
> > http://www.hughski.com/index.html
>
> For those who don't know... Richard Hughes (the designer of the ColorHug
> Colorimeter mentioned above) is also the main person behind colord.

There seems to be some discussion about colord vs. oyranos. I never mend get
started that one...

>
> http://www.freedesktop.org/software/colord/index.html
>
> Regards
>
> Richard
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Le 11/09/2013 18:18, Gilles Caulier a écrit :
> I just take a look if a Linux Application already support CM with multi-screens.
>
> - Scribus : no
> - Gimp : no
> - Krita : no
>
> anything else ?

is it necessary? As I understand this one screen is for images, the
other for various tools where color do not matter (but I do mostly video)

jdd


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[Peter Albrecht]

On 11.09.2013 15:00, Gilles Caulier wrote:
> 2013/9/11 Wolfgang Mader <[hidden email]>:
>> On Wednesday 11 September 2013 12:01:50 you wrote:
>> I am on Arch Linux and had to install the package kolor-manager separately.
>> Then you get a new icon on the top level of system settings called "Color
>> Management" and a new box to tick in the "Desktop Effects" -> Advanced ->
>> Box(Enable Color Correction (Experimental)).
>
> Sound like an extra package from your distro not a standard one
> distributed by KDE. Here (Mageia3), it do not exist...

Gentoo Linux provides ebuilds for:
  - kde-misc/colord-kde
  - x11-libs/colord-gtk
and
  - kde-misc/kolor-manager

But kolor-manager does not use KDE version numbers like,
4.11.0, but 0.99 an 1.01. So it looks like it is not very
integrated yet.


When I bought my ColorHug on February 2013, I followed
http://scribblesandsnaps.com/tag/colorhug/ (Thanks Dmitri!)
and installed:
  - media-gfx/argyllcms
  - media-gfx/dispcalgui
  - media-gfx/colorhug-client,
    which depends on x11-libs/colord-gtk
    (although Desktop is KDE)

This works very well for me as a color management layman. ;)

Regards,
        Peter

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[Marcel Wiesweg]

>
> Therefore, there should not be any interference between this color
> profile management, and the color correction of digiKam, which by the
> way may use a different profile than the one advertised by colord.

digikam supports reading a color profile via the old traditional way of an
XAtom.
There is some provision for multiple screens with different profiles, and
digikam usually requests a profile for a given widget in its framework, but
the XAtom stuff is not really documented so I dont think it supports multple
screens.

Now, if colord provides something like a DBus API to retrieve profiles we will
happily include support for this.

Marcel
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[Brian Morrison]

On Wed, 11 Sep 2013 21:39:17 +0200
Marcel Wiesweg <[hidden email]> wrote:

> Now, if colord provides something like a DBus API to retrieve profiles we will
> happily include support for this.

From their web page:

What colord does:

    Provides a D-Bus API for system frameworks to query, e.g. Get me the profiles for device $foo or Create a device and assign it profile $bar.
    Provides a persistent database backed store that is preserved across reboots.
    Provides the session for a way to set system settings, for instance setting the display profile for all users and all sessions.

So it would appear that it does exactly what you need to provide the
support your are suggesting.

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Brian Morrison

                "I am not young enough to know everything"
                                                          Oscar Wilde
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