Archived posting to the Leica Users Group, 2002/03/26

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Subject: Re: [Leica] Re: dMax and Dyanmic range - scanners
From: John Brownlow <lists@johnbrownlow.com>
Date: Tue, 26 Mar 2002 11:37:04 -0500

On 3/26/02 11:09 AM, "John Brownlow" <lists@johnbrownlow.com> wrote:

> For example, a scanner which can capture 12 bits is capable of representing
> 4096 distinct shades of gray (ignoring color for the moment). It's
> *theoretical* dynamic range is therefore
> 
>   log10(4096) - log10(1)
> 
> Which is 3 and a bit (sorry don't have slide rule handy)

Sorry, what I didn't say explicitly is that THIS is the number the scanner
manufacturers use for their Dmax.

- -- 
John Brownlow

http://www.pinkheadedbug.com

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