Re: Dynamic range and bit depth
Re: Dynamic range and bit depth
- Subject: Re: Dynamic range and bit depth
- From: "Isaacs, Jeff" <email@hidden>
- Date: Wed, 06 Dec 2000 10:54:03 -0500
- Organization: Associated Press Broadcast News Center
I have to agree with Andrew here. Just because a device has the mathematical
capacity to represent a certain dynamic range, doesn't mean that the sensor and
related electronics are capable of capturing information at the limits of that
range.
- Jeff
Andrew Rodney wrote:
>
on 12/6/00 6:29 AM, Roger Breton at email@hidden wrote:
>
>
> I have to disagree with you, Andrew: dynamic range and bits are completely
>
> interrelated.
>
>
I guess we will have to agree to disagree.
>
>
> A 10 bit scanner can represent 1024 discrete levels (2 to the 24 power)
>
> which corresponds to a dynamic range of 3. 12 bits of data, on the other
>
> hand, yields 4096 discrete levels which is somewhere between 3 and 4, in
>
> dynamic range. 14 bits of data (2 to the 14 power) is all you need to
>
> accurately represent the 10,000 discrete levels of a dynamic range of 4.
>
>
I think your use of pure math is misleading. If your accounts are true,
>
EVERY 10 bit scanner would have a dynamic range of 3. Every 14 bit scanner
>
would have a dynamic range of 4. This clearly isn't the case. It's like
>
suggesting that because a 24 bit color file mathematically can have 16.4
>
million different colors, that's the case with all 24 bit files.
>
>
Andrew Rodney
>
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