[argyllcms] Re: colprof quality
- From: <graxx@xxxxxxxxxxxx>
- To: <argyllcms@xxxxxxxxxxxxx>
- Date: Mon, 3 Feb 2020 19:21:02 -0500
Gerard,
The selected target gamma on this NEC PA271W is 2.2.
My measurements and humble Excel Solver calculation gives value of 2.16.
/ Roger
-----Original Message-----
From: argyllcms-bounce@xxxxxxxxxxxxx <argyllcms-bounce@xxxxxxxxxxxxx> On
Behalf Of Gerhard Fuernkranz
Sent: Monday, February 3, 2020 7:18 PM
To: argyllcms@xxxxxxxxxxxxx
Subject: [argyllcms] Re: colprof quality
Am 03.02.20 um 16:39 schrieb graxx@xxxxxxxxxxxx:
It would seem to be that 33 grid points is an overkill for a
well-behaved monitor profile, especially one with internal 14-bit LUTs?
I'm not sure how exactly Graeme splits up the transformation of XYZ LUT
profiles into its components (1D curves, matrix, CLUT). If the resulting
CLUT happens to be pretty flat, it requires a lower number of points to
achieve a particular interpolation accuracy. [ Note, at least the CLUT of
Lab profiles can have a significant curvature, even if the device is
"well-behaved". As said, I'm unsure regarding XYZ LUT profiles created by
colprof. ]
Btw, are the internal LUTs calibrated? If yes, what target TRC are they
supposed to emulate?
Regards,
Gerhard
Other related posts:
