Re: LCD color calibration
Re: LCD color calibration
- Subject: Re: LCD color calibration
- From: Graeme Gill via colorsync-users <email@hidden>
- Date: Mon, 08 Jul 2019 13:58:24 +1000
THOMAS A LIANZA via colorsync-users wrote:
> A wide gamut panel will
> necessarily have an input lookup table, a matrix or 3D out, followed by a
> display look
> up table. In general, use of the graphic card LUT is not recommended at all
> inmost
> modern calibration environments.
Nice in theory, useless in reality, because there are no standards. There
is no standard, reliable API for discovering and manipulating a displays
internal capabilities - the display makers all play the proprietary game,
and the OS makers don't have good, reliable API's for accessing these
capabilities. In contrast, there are standard, reliable API's for accessing
video card per channel lookup tables. Given that the ICC profile format
has been sabotaged in regard to display profile absolute colorimetric intent,
the video card calibration curves are the only standard mechanism available for
software to set white point and brightness. If this is ever to
be improved, an effort at standardization amongst display makers and
OS vendors is needed, that will overcome the tendency of vendors to
be secretive and play proprietary games.
Graeme Gill.
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