Re: Colour fidelity & low-light AF of *ist-D

[Joe Wilensky]

This brings up a question I have always wanted to ask -- related to 
the fact that my own two eyes see colors slightly differently! It's 
easiest to see in skin tones, but if I close one eye and then the 
other, it's obvious to me that my right eye sees a slightly "warmer" 
or redder rendition than my left. It's slight, and with both eyes 
open I suppose I see an average or mix of the two that isn't 
disconcerting, but it's obvious that at least slight differences must 
exist among people. Maybe wide ranges of difference are normal, like 
television sets where the tint is all out of whack and faces look 
green or magenta.

Has anyone tried this? It may be more noticeable in daylight or 
artificial light. Just a quick switch from one eye to the other and 
back should tell you.

Joe


I think its more likely that different eye/brain sets might see the same
colour very slightly shifted, one way or the other, on the spectrum. One
person might see it a little redder or bluer than another. But, as we
decided before, one can never really know. Its not the same as colour
blindness. My guess is that normal human eyes all see the spectrum the same
way and it is in the brain that differences might arise ... if they do.
Don

 Hi,

 Thursday, November 6, 2003, 2:24:49 PM, you wrote:

 > It's an interesting thought, but what I perceive to be blue might
actually
 > what you perceive to be green. Imagine people around you who go thru
life
 > seeing 'blue' vegetables (though it seems perfectly normal to them
*because*
 > that's what they always known the label 'green' to refer to). And how
would
 > one actually prove any of this?

 I don't think it's empirically testable. If two people attach the same
 label to the same experience then that is all we can know, or need to
 know. I have no empirical evidence that other people think; you could
 all be automata* as far as I know, but I assume that you all do think.
 It's similar to the Turing** test, or these games of Chinese boxes that
 AI researchers enjoy so much.
 Cheers,

 Bob

 *as a matter of fact I happen to think exactly that, except that I
 include myself as an automaton. It doesn't alter the argument.
 **I've always believed that 'the Who' of long ago was a Turing test
 > that some researcher was conducting.