Digital BW, The Print

David,

Amazing how Spiders can creep into everything - even dreams!   Mind you, I'm 
not sure the strange things you mention (do you use spellcheck?) qualify as 
Spiders! My book on Spiders says they have eight legs, and eight eyes, and 
evolved about 400 million years ago. So perhaps your three-legged, one-eyed 
one is an early evolutionary dead-end!  ;)

Spiders only see in B&W (back on topic!), and the jumping spider vibrates 
its retina so that it can collect more info with fewer sensors in the eye! 
NASA is working on this idea apparently. A camera that vibrates its sensor 
to increase resolution, not just to get rid of dust or the 'shakes'.

Bob F.

----- Original Message ----- 
From: <CDTobie@...>

and I even dream at night in color

We have two entire image processing systems: Red, Green, and Blue sensitive
cones for color, and monochrome rods for B&W. Being "unfiltered" the rods 
are
more sensitive, so we depend on them for night vision, when our color vision
fails. The rods see things as quite cool (blue), so when the two types of 
vision
mix, the rods add a blue component. This is why at low room light you
calibrate a low luminance CRT to a much yellower 5000k whitebalance ( to 
compensate
for this blueness), and at moderate room lighting, you can calibrate a much
brighter LCD to a 6500k whitebalance, for similar visual results. That is 
one of
the factors that the ambient light feature in Spyder2PRO adjusts for...