[colord] How do you calibrate projectors with colord and GNOME Color Manager?

[Jeff Fortin Tam]

Le mardi 27 janvier 2015 à 11:48 +0000, Richard Hughes a écrit :

> > The gnome color user manual documents how to calibrate a screen, a
> > camera or scanner, but nothing is said about projectors, including the
> > setup, distance, whether you must turn off ambient lighting or not, etc.
> 
> Right, it's typically because projector suck :)
> The gamut is normally very small.

What I meant was that the technique is not documented at all in the user
manual; I would be happy to spend time writing that page (I presume it's
in Mallard format) if you give me rough pointers wrt those existential
questions above.


> > And as the GNOME color calibration process creates a small square on the
> > center of the screen (instead of making the whole screen a solid color),
> > I have a hard time imagining how this can work correctly.
> 
> Right. I guess the correct thing to do here would be to set the entire
> screen the sample area and to turn off ambient lighting in the room. I
> don't think it's something a lot of people have been doing (and I
> don't own my own projector) so it's probably the path most untraveled.
> Bugs welcome.

Actually there's https://bugs.freedesktop.org/show_bug.cgi?id=78825
Fixing the square size to be fullscreen would solve two issues at
once :) hope you can give it a shot, would love to try this out soon.
Currently I have access to a lot of projectors and lighting scenarios,
so if the basic calibration can be made to work* I can make a report on
my experience with this.


*: besides fdo bug #78825 above, there's also this blocking me
   from achieving anything in Fedora 21:
   https://bugs.freedesktop.org/show_bug.cgi?id=87519