Re: NEC PA271Q "Native" chromaticities
Re: NEC PA271Q "Native" chromaticities
- Subject: Re: NEC PA271Q "Native" chromaticities
- From: Gerhard Fuernkranz via colorsync-users <email@hidden>
- Date: Tue, 7 Jan 2020 00:26:46 +0100
Am 05.01.20 um 17:33 schrieb Andrew Rodney via colorsync-users:
In sRGB, 1/255/240 and 2/255/240 are different triplets of numbers. They ARE
the same color as the dE between the two device values is 0.01:
Hmm, I'm not comfortable with this definition of "same color", since it does
not fit with the rule that A=B and B=C implies A=C.
Note, if 0 were the same as 0.1, and 0.1 were the same as 0.2, and 0.2 were the
same as 0.3, ... and 9.9 were the same as 10, this would imply that 0, 0.1,
0.2, 0.3, ... 9.9, 10 are _all_ the same, i.e. it would also imply that 0 is
the same as 10. But I think you would no longer consider L* = 0 the same
lightness as L* = 10.
[ Color (expressed in CIE units like XYZ) is IMO per se a continuous quantity
(with infinite precision), like length, weight, temperature, voltage, power,
etc. The limited precision of a color measurement device (like our eye) is a
different issue. And precision loss due to quantization caused by a particular
encoding is yet a different issue, too. ]
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