Re: Colormatch vs Adobe 98
Re: Colormatch vs Adobe 98
- Subject: Re: Colormatch vs Adobe 98
- From: Chris Murphy <email@hidden>
- Date: Fri, 1 Feb 2002 12:30:15 -0700
email@hidden
(email@hidden) writes:
>
With regard to monitor (i.e. emissive) colorimeters, this is simply not
"Bruce J. Lindbloom" <email@hidden> writes:
>
There is nothing inside the instrument that has to do
>
with any reference illuminant (D50, D65 or anything else). These
>
colorimeters produce XYZ, not Lab.
Bruce,
Would it be correct to say that an emissive colorimeter also has a
reference illuminant, but that it's based on the SPD of a CRT (or LCD, or
somehow can switch between both) instead of D50 or D65 - and that this
component is built into the selection of the specific filters for the
colorimeter and the math used to put an XYZ number to the stimulus they
measure?
As a colorimeter doesn't see the spectral emission from a monitor, it
doesn't have any way to utilize an illuminant SPD; but there is still
effectively an "implied" illuminant which is the spectral characteristics
of the display itself - which is why colorimeters for CRTs don't do a
good job on LCD's. They must be specifically designed with those spectral
emissions in mind.
Yes/No?
Chris Murphy
Color Remedies (tm)
Boulder, CO
303-415-9932