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: Tue, 23 Aug 2011 17:42:51 +0100
- Importance: Normal
From: Graeme Gill
I think my summary hit the mark somehwat better than the "we see 20
degrees",
while not delving into all the minute detail of cone and rod distribution.
What I find amazing is that we are still using the 1931 2-degree standard
observer that was based on research done in the 1920s apparently with just a
dozen men all living near London! One can't blame the original researchers
for their choice of subjects, but for the CIE to use this data (after all
sorts of jiggery-pokery to make it more usable for their aims) to represent
all human color vision seems incomprehensible to me - a biologist. Has
anyone repeated these tests with a decent-sized sample of people - men and
women of different ages from different countries?
I particularly like the reason for the 2 degree field - because outside this
small area they knew the the distribution of cones in the retina varies
which makes things difficult! Inside this area the cone population is fairly
constant, though deficient in S-cones as we now know but they didn't.
Reading all this stuff, it doesn't surprise me in the least that Roger finds
that, since nothing ever matches, color accuracy is not the name of the
game. Sorry Roger if that is not quite what you said. ;
Bob Frost
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