[argyllcms] Re: Correction matrix backlight dependent?
- From: Gerhard Fuernkranz <nospam456@xxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Wed, 23 Dec 2020 12:42:12 +0100
Am 22.12.20 um 22:29 schrieb Andreas Mock:
When I want to use the colorimeter together with a correction matrix to create
a profile on a not hardware calibratable monitor to hit a specified target
(e.g. sRGB, 6500K, 120 ca/m²), is it necessary/better/optimal to create the
correction matrix with the intended backlight level of the target? In this
example turning backlight to a level more or less hitting 120 ca/m² and the
creating the correction matrix?
If the set of all spectra that can be emitted by the display cannot be
decomposed into a linear combination of only three basis spectra, then a 3x3
correction matrix cannot be exact either, but only an approximation.
In this case it can indeed make sense to optimize the correction matrix for the
desired operating state of the display, and for a (sub)set of colors which you
want to get displayed as accurate as possible (the latter is determined by the
set of patches used to create the correction matrix).
As long as the colorimeter's filters resemble the standard observer closely,
I'd not expect too much difference. For a non-colorimetric RGB color sensor,
the difference could be more significant, though.
Regards,
Gerhard
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