@me4502 (View Post)
Ok. Now I got it. I think the same.

Blue? Of course we know what blue is, blue is.. er.. uuh..

I find color blindness slightly the same way. A fire sign, for instance, is "red" to me. I know this because of common sense. But I can't pick out a color out of a bag to save my life.

@IronRhino, Not quite the same way, Color blindness isn't exactly what we were talking about, we were discussing how a color might be different but we call it the same thing, just because that's what we were taught. So you might see color A and call it blue but I would see color B and also call it blue. Two different perceptions of a "color" but we call it the same thing because we don't know if it is different from what the other person is seeing. Then we discussed how a robotic eye could transmit signals to determine the difference somehow.

So given a certain object, we agree that it is a certain color, but what we really see is the same color?
(what we both see is blue, but if I use your brain and eyes, do I see my blue?)

So like relativity, each observer has a frame of reference (how they see the color), and each one is correct.

Yes, but we wanted to further the idea by finding a way to test it. We need a baseline to determine a visual perception difference in the two peoples perceptions of a certain color shade. ( see equation for better confusion :)

Edit: @Lockheedmartin, stop posting before I do! :P lol it's driving me crazy

I think to test this, we need to consider how their eye works (the sensitivity for each color, etc.) and how their brain works (which parts the color activates)
Then, the test would be to give at least two persons the same object and the difference in signals is the difference in their perception of the color. Then try to simulate one of the signals in the other person by giving other colors to the person, and that is how the other person perceives the color of the first person.
The difference might be very little, so high precision instruments must be used.