Re: Flatbed scanners vs Pro Photo CDs
Re: Flatbed scanners vs Pro Photo CDs
- Subject: Re: Flatbed scanners vs Pro Photo CDs
- From: Andrew Rodney <email@hidden>
- Date: Tue, 05 Dec 2000 07:06:10 -0700
on 12/4/00 9:21 PM, Jan Steinman at email@hidden wrote:
>
Something is rotten here. Bits-per-pixel and Dmax should roughly
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correspond, unless those are "marketing bits" instead "real bits." A
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"real" 14 bit scanner should achieve Dmax circa 3.6. If it's
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quantizing to 14 bits, but for whatever reason (noise, whatever), it
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can only achieve 3.2 Dmax, then a number of those bits are simply
>
returning noise.
Dynamic range and bit depth have absolutely no correspondence. You can have
a 10 bit scanner with a dynamic range of 3.8 and a 12 bit scanner with a
range of 3.3. Completely different spec's. Also be aware there is no
universally accepted way of measuring dynamic range.
Andrew Rodney