Archived posting to the Leica Users Group, 2003/08/25

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Subject: Re: [Leica] OT stupid scanning question
From: "J. Gilbert Plantinga" <>
Date: Mon, 25 Aug 2003 09:52:23 -0400

Apples and oranges. Scan in 16-bit gray or 48-bit RGB. Some people do 
scan black and white as color and then use the channel mixer to convert 
to grayscale. The green channel is usually sharpest. Either way you 
should use the full 16 bits per channel while making global tonal 
adjustments to avoid posterization (shown as gaps and spickes in the 


On Monday, August 25, 2003, at 08:56  AM, Steve Unsworth wrote:

> If I'm scanning black and white is it better to scan in 16 bit 
> greyscale
> than 24 bit RGB? I'm pretty sure the answer is yes.

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