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Can the entire color gamut be scanned from a slide?
Old 07-21-2004, 09:33 AM   #1 (permalink)
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I'm a bit confused by something. If you take a slide (say Fuji Provia 100), and scan it useing one of those big fancy scanners, is it possible to capture the entire color range shown in the slide??

Thanks!

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Re: Can the entire color gamut be scanned from a slide?
Old 07-21-2004, 10:03 AM   #2 (permalink)
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A 48-bit scanner will capture a theoretical maximum of 281 trillion colors, which is far more different colors than the human eye is capable of distinguishing.

Or probably even exist.

Next logical questions: can your MONITOR and PRINTER reproduce 281 trillion colors?

Even at 16-bit greyscale, thats 65,635 shades of grey.
 
 
Re: Can the entire color gamut be scanned from a slide?
Old 07-21-2004, 10:20 AM   #3 (permalink)
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Indeed, you can, but you won't be able to print them all.
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Re: Can the entire color gamut be scanned from a slide?
Old 07-21-2004, 11:51 AM   #4 (permalink)
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Yes, and no.

You can scan in your scanner's entire effective color gamut from a slide.

However, there is *no* mechanical device or process that can cover the entire color gamut of the human eye. The scanner's gamut may be, and very probably is, *larger* than the eye's gamut, but they are not necessarily completely overlapping.

To explain in plain English, suppose my eye can distinguish 100 distinct shades of red. Suppose furthermore I have a scanner which can read 256 distinct values for shades of red. The scanner's gamut is larger than my eye's gamut for values of red. But suppose the scanner hasn't got a blue sensor, while my eye can also distinguish 100 shades of blue. Now even though the scanner can still see more distinct shades than I can, I can see colors it can't. That's the problem with gamut map seperation.

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