Thanks for the time you have spent on this response. There's more to it
than I thought - especially further opportunity to make a fool of
myself, failing to understand the implications of 'input' in 'input
profile'.
Much of what you explain is well beyond my pay grade, especially as I
still do not understand how to tell dt where my icc profile is - if it
is not using the Mint 'standard' (?) location of /home/user/.local/share/icc
I did calibrate the monitor, using SpyderX and its calibration software,
but under Windows (as far as I could see it is not possible for somebody
like me to run ArgyllCMS on Mint 20 because it is not yet supported on
that release). I placed the resultant .icc file in
/home/user/.local/share/icc but do not know how to check if dt is
actually applying that profile - or indeed if dt expects the correct
monitor profile to be assigned by the OS.
I was going to try using DisplayCAL, but a cursory browse based on the
URL you referred me to shows that DisplayCAL depends on ArgyllCMS, which
will not install on my Mint20, (within my limits of knowledge). So that
option is not available to me.
For the time being images shown on my monitor by dt do not appear to be
wildly different from what I think they look like 'in the flesh', so I
guess I'm going to have to live with my ignorance and just accept that I
have no idea of how colour management is implemented in dt. There are
some things that one cannot change in life.
On 09/11/2020 19:53, KOVÁCS István wrote:
On Mon, 9 Nov 2020 at 17:26, tony Hamilton <shaky.st...@ntlworld.com> wrote:
Running Linux Mint 20 and dt 3.2.1. Hovering the mouse over the 'input
color profile' module, 'input profile' parameter (currently set to
'embedded ICC profile') produces help/guidance information: "ICC
profiles in /home/user/.config/darktable/color/in or
usr/share/darktable/color/in".
Those are INPUT profiles (e.g. for cameras and scanners). Anything
under /home/<username> is only available for the given user.
/usr/share is shared files, shipped by your Linux distribution,
managed via packages
/home/user/.local/share/ICC - user-level, but not darktable specific.
/usr/local/share is also shared, the root user can place unmanaged
files (not coming from packages of the distro) there.
If you calibrate your screen using dispcalgui, it's going to use path
described here:
https://displaycal.net/#userdata --> so to
/home/<username>/.local/share/DisplayCAL/storage
You can (logged on as root) copy them to
/usr/local/share/dispcalGUI/storage/ (or maybe dispcalgui or some
Linux colour management configuration tool can do that?). Personally,
I've copied them to a shared but user-writeable directory, and load
them using dispwin when launching darktable, since there was a time
when I had issues loading them via the nice GUI config tools (probably
caused by my lack of understanding), like this:
dispwin -I "/use/an/arbitrary/path/that/you/like/dispcalGUI/storage/HP
ZR22w 2015-10-11 D6500 2.2 M-S 3xCurve+MTX/HP ZR22w 2015-10-11 D6500
2.2 M-S 3xCurve+MTX.icc"
I've put this into a shell script, which is invoked by my other shell
script that loads my self-compiled darktable (dev version).
Kofa
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