Archived posting to the Leica Users Group, 2010/01/11

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Subject: [Leica] [OT] Scanning Kodachrome help
From: pasvorn at boonmark.net (Pasvorn Boonmark)
Date: Mon, 11 Jan 2010 23:11:40 -0800
References: <E8DFA4CE-D3BD-4629-8305-88BD92A0B418@aotera.org>

Hi Spencer,

Wow, this is a tough one.

Original - <http://www.aotera.org/tmp/ice.jpg>
With my adjustment -
   <http://farm5.static.flickr.com/4037/4267753913_c31ba96125_b.jpg>

This is what I did:
 a) duplicate layer
 b) desaturate RED, and Magenta
 c) Overlay the top layer and adjust opacity

The top part looks more B&W.  Not sure how it looks on your screen.

-Pasvorn

On Mon, Jan 11, 2010 at 8:26 AM, Spencer Cheng <spencer at aotera.org> wrote:
> Folks,
>
> I've been working on scanning some Kodachrome slides using mostly Vuescan 
> as that is the one I am most familiar with. I've calibrated my scanner 
> with an IT8 target I bought from Silverfast in both Vuescan and 
> Silverfast. I've calibrated my MacBook Pro's screen with a Datacolor 
> doohickey.
>
> One group of slide has been very hard to scan. I can't seem to get rid of 
> an magenta'ish cast. The pictures was shot on an overcast day [Edith 
> Cavell glacier, Jasper National Park (Canada)]. The original slide has a 
> beautiful milky green tone to the water and the snow banks was almost 
> white - definitely not magenta.
>
> If I correct for the snow, the water turns grey. If I correct for the 
> water, the magenta cast gets worse.
>
> I've tried this in both Silverfast and Vuescan. Both gives similar 
> results. It's driving me crazy.
>
> Here is an example of a very bad scan from Silverfast.
>
> <http://www.aotera.org/tmp/ice.jpg>
>
> Any suggestions?
>
> Regards,
> Spencer
>
>
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>


Replies: Reply from mark at rabinergroup.com (Mark Rabiner) ([Leica] [OT] Scanning Kodachrome help)
Reply from philippe.amard at sfr.fr (philippe.amard) ([Leica] [OT] Scanning Kodachrome help)
In reply to: Message from spencer at aotera.org (Spencer Cheng) ([Leica] [OT] Scanning Kodachrome help)