Re: Colorimeters and third-party developer support
Re: Colorimeters and third-party developer support
- Subject: Re: Colorimeters and third-party developer support
- From: Bob Frost <email@hidden>
- Date: Mon, 22 Aug 2011 19:11:31 +0100
- Importance: Normal
If you find a "problem" with your
eyeballs, how do you fix it?
Get some new lenses that are clear instead of the increasing yellow color
that comes with age? When I went in to the operating room to have a lens
replaced, the nurses were wearing gray and white uniforms. When I came out,
the uniforms were blue and white with the new lens, and gray and white with
the old lens in the other eye!
I've seen evidence that makes me doubt my perception where I will measure
the same patch of color on a proof and on the screen where the two
chromaticities measurements are within fractions of each other (no need
for
fancy conversion to Lab to compute DeltaE here). Yet, my brain tells me
that
there *is* a difference between the two because I can "see" it. Is the
difference "real" then?
Ah, my White Paper syndrome gives me an anwer?
In
http://www.eizo.co.uk/color_matching_between_srgb_monitors_and_wide_color_gamut_monitors
there is some interesting analysis of why white on two monitors may measure
the same, but look different. It's apparently because monitor calibration
depends on 2-degree field-of-view calculations, whereas human vision is
nearer a 20 degree field-of-view. If the visually dissimilar monitors are
re-calibrated to a 10-degree field-of-view, they apparently now look the
same, and measure the same.
Does that cover your question?
Bob Frost
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