Ben,
If I’m using an i1proX “class” instrument then, you say it might not be a
luxury to dispense of spectral data all together? And only feed in XYZ in the
ti3 file?
Sorry to bring back the age-old question, what kind of “stimulus” colors
exactly benefit from measuring with a (filter-based) colorimeter such as
i1Display (old DTP94, Spyders…) rather than with a (holographic-based)
spectrometer instrument? Extremely saturated colors, such as the “pure
primaries” or the “low Luminance” colors such as below 5 Cd/m2?
Never mind the relative accuracies of each instruments.
/ Roger
From: argyllcms-bounce@xxxxxxxxxxxxx <argyllcms-bounce@xxxxxxxxxxxxx> On Behalf
Of Ben Goren
Sent: Monday, June 14, 2021 2:12 PM
To: argyllcms@xxxxxxxxxxxxx
Subject: [argyllcms] Re: Spectral data for building Monitor profiles
On Jun 14, 2021, at 11:02 AM, graxx@xxxxxxxxxxxx <mailto:graxx@xxxxxxxxxxxx>
wrote:
Are there any advantages to having spectral data for building monitor profiles
with argyll? (Or with any profiler in general, I suppose)
Suppose I try to make my life simpler? And I have a choice of including both
XYZ and spectral data from my instrument into the ti3 file? Am I getting
“better”, lower DeltaE, better 3D “fit”, in having spectral data in then ti3?
If, in addition to your spectrometer, you also have a colorimeter, “best” would
be to create a CCMX.
The documentation gives all the details, but the basic idea is that you measure
the primaries with both instruments. Argyll then does some math to figure out
the interplay of the colorimeter’s primaries and the display’s primaries;
that’s what the CCMX records. Then, you build the profile with a full set of
measurements from just the colorimeter “filtered” through the CCMX.
Colorimeters are almost universally more sensitive in low emissive environments
and faster in general than spectrometers. Measuring the display with the
colorimeter lets you get better measurements of the near-blacks, and you can
get more measurements in the same amount of time. Thanks to the CCMX, there’s
no loss of spectral fidelity.
If you don’t have a colorimeter…I don’t think the spectral data is going to do
much to improve things. It won’t hurt, and it might be a fun thing to
experiment with. But it’d be pretty far down on my own personal list of
priorities.
b&
