> Back to scanning - if you need to get all the info that is in a
> photograph ABOUT THE ORIGINAL SCENE, a three channel scanner is enough,
> because the original photo process has already reduced it to 3 chans.
> By using a multispectral scanner, you'll only get more info about the
> spectral shapes of the pigments (dyes) that make up the photo.
Assuming that the photo is perfect, yes.
If you need to determine if something is red, or a reddish stain, then
you can't do it solely by looking at RGB.
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