[filmscanners] RE: 8 bit versus 16

["Austin Franklin" <austin@darkroom.com>]

Robert,

> You
> are telling me that there is no point in using 16 bit, yet working
> with grayscale there is!

Grayscale only has one channel, and the TOTAL number of bits available is
only 8 bits per pixel, for 8 bit grayscale.  For color, there are three
color channels available, and therefore the TOTAL number of bits per pixel
is actually TWENTY-FOUR using 8 bit/color pixels, instead of simply 8.

24 bits is 2**24 or 16,777,216.  8 bits is only 256.  Hum, we have a few
orders of magnitude in available tones to work with here...

> And the colour separations on RGB (the
> 256 colour 8 bit ones, are fine to work on) - yet not on B&W.
> P.T. who?

This statement is nonsensical, as it clearly shows you have misconception of
the concepts involved here.

> Or they might want to follow youre religion, and miss out on
> enlightenment.

I would hardly call your "position" enlightened.  You've got clear
misunderstanding of some of the concepts here, as well as apparent lack of
experience.  If I were you, given what I've read here, I'd strongly suggest
you either try to learn something, instead of try to rationalize your
position, because you can learn something here if you want to.

Instead of fussing, you ought to post a raw image, and then an image
manipulated using only 8 bits and one using 16 bits, that shows this problem
you are citing.  If you can't then what you claim is simply myth.

Regards,

Austin



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