Re: 16 bits = 15 bits in Photoshop?
Re: 16 bits = 15 bits in Photoshop?
- Subject: Re: 16 bits = 15 bits in Photoshop?
- From: Richard Wagner <email@hidden>
- Date: Wed, 13 Apr 2005 16:15:25 -0700
Pablo,
Of course, you're correct. 1 millivolt resolution of a 10 volt signal
would give 10,000 levels. You'd need ~ 150 microvolt resolution for the
full 16 bits. I've had my doubts about 16-bit resolution on
cameras/scanners (often incorrectly referred to as "dynamic range").
The ADC may be 16-bit, but the true resolution is unlikely that small.
Noise, noise, noise... And then going the other direction, to
output... same issues.
Actually, the next "jump" was from 8 to 10, then 12-bit ADCs in
cameras. I do think we'd all agree that 12 bits/channel is better than
8. The remaining bits in the 12-bit word are simple not used. I'm
personally dubious of anything over 14 bits - meaningful data, or not?
I doubt Adobe is looking to change things - 15 vs. 16 bits is
definitely not a "real world" problem. Sorry if it seemed I was
serious.
Hello to all.
There's no "optical" reason why 16-bits is desirable over 15 or 17.
It's computers that force the jump from 8 to the next step which for
binary computers is 16 bits.
I don't believe anyone here would assess that there's a relevant
difference between 15 and 16 bits in the real and in the way-beyond
real world.
--Rich Wagner
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