Datacolor User to User Support Group.

I like to go camping. My first tent was red. When I awoke to the 
morning sun through the red tent, everything looked OK. When I 
climbed out, my world was cyan for quite a while. For your eyes not 
to adjust to color bias may be a gift in that such a person could 
visually calibrate without instrumentation.:)

--- In colorvision_group@yahoogroups.com, "mhovie71" <martin@...> 
wrote:
>
> 
> > > > No, that defies the laws of color theory; if you fill a room 
with
> > > yellow
> > > > light, the eye adapts, and that yellow light looks white. 
There must
> > > be some other
> > > > source before your eye can distinguish.
> > > 
> > > That can't be correct.
> > > 
> > 
> > I guess I will refrain from arguing basic color theory with you, 
and
> refer 
> > you to any text on the subject.
> 
> Out of curiosity, I tried this yesterday evening: I've projected a
> bright yellow image and spent 30 minutes in the room, looking at 
the
> image without any other light source in the room.
> 
> And guess what: after that time, the image was still yellow! Maybe 
my
> eyes were a bit less sensitive to yellow, but the color still was
> obviously yellow, not white. Must be because my eyes and my brain 
know
> what yellow looks like, so they don't need a direct comparison 
with a
> different color to tell that it is not white. That's pretty 
logical,
> because the brain can learn and remember. Otherwise you'd always 
need
> a dog standing next to a cat to tell which one is the dog!
> 
> So you can refer me to any text you like, but this will not change 
the
> personal experience which I can verify anytime. I don't rely on
> theoretical papers on the subject as you do, but I try things 
myself.
> This is much more reliable and furthermore it shows me how I
> personally experience things, not how it could be in theory.
> 
> Also, your whole argumentation about the eye adapting to a white 
point
> is wrong when I watch a movie with the projector. The image is not
> always white - it's sometimes mostly green, then red, blue, 
whatever.
> So when the image is white or grey again, you can tell to which 
color
> it's biased, because this bias is not always dominant and so the 
eye
> (or actually the brain) will not filter it out. That's really 
easy -
> try it yourself instead of reading about it and you'll see what I 
mean.
> 
> Regards,
> 
> Martin
>