OK ... I think I've got it now.

One more question.  Everyone's describing color.  How does all this work
with B&W?  Do I need as many bits to get good B&W results?  

Jan van Wijk wrote:

> Yes, except that "16 bits" is not 16 
> different colors but "2 to the power of 16" 
> which is 65536!
> 
> (see my other reply for more examples)
> 
> In you above anlogy, you could have a pixel 
> using "24 bits" which would be 8 bits for each 
> basic color Red, Green and Blue.
> 
> It would mean the scanner can select between 
> 256 different Reds, 256 different Greens
> and 256 different Blue cans of paint to mix 
> to get the color for that one pixel.
> (that is over 16 million different colors to choose from)

-- 
Shel Belinkoff
mailto:[EMAIL PROTECTED]
http://home.earthlink.net/~belinkoff/
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