P3D orange masks on color negatives

[Ralph Johnston/Linda Sherman <copley@xxxxxxxxxxxxxxx>]

Results of using Corel PhotoPaint 7 to remove an orange mask and invert are
shown at:

<http://www.ultranet.com/%7Ecopley/StereoNE/2dgallery.html>http://www.ultra
net.com/~copley/StereoNE/2dgallery.html

Use the "effects-PhotoLab-CSI Negative" tool.  There is an overall green tint
which is not easy to correct.  However, the tool has two slider adjustments
which might have helped.

On another subject:  I will be showing some realist format slides at the Nov 21
Stereo New England meeting.  They are taken from my collection of stereo view
cards of cats with little girls.  The cards were scanned at 600dpi, adjusted
for contrast-brightness-intensity, and each half resampled to 1200 pixels
high.  Then the 19" screen was photographed using a macro lens.  In order to
get the RBT realist mount to match the frame on the cards, I had to miss the
captions on the bottom, but the slides came out very nice in a viewer.  I am
now touching up the mounting for projection.

I have 40 slides which should make for a good program.


-Ralph

>
> ----------------------------------------------------------------------
>
> Date: Sun, 10 Oct 1999 18:15:02 +0100
> From: pacaine <pacaine@xxxxxxxxxxxxxxxxxxxx>
> To: photo-3d@xxxxxxxxxxxxxxxxx
> Subject: P3D Re: PHOTO-3D digest 3538
> Message-ID: <3800C996.4F2D83A5@xxxxxxxxxxxxxxxxxxxx>
> MIME-Version: 1.0
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>
> >
> >
> > Date: Fri, 8 Oct 1999 14:48:50 -0500
> > From: David.Clark@xxxxxxxxxxxxx
> > To: photo-3d@xxxxxxxxxxxxxxxxx
> > Message-ID: <86256804.006CC7A1.00@xxxxxxxxxxxxxxxxxx>
> > Mime-Version: 1.0
> > Content-type: text/plain; charset=us-ascii
> > Content-Disposition: inline
> >
> > The orange in negative film is a dye applied differently to each color
> layer of
> > the film.  This adjusts for the differences in density between each layer. 
> The
> > fact that different amounts of orange are applied to each of the three or
> four
> > color layers makes it very difficult to remove in Photoshop.  Two films
> where
> > the composite of all the layers show the same orange cast are probably
> entirely
> > different.
> >
> >
>
> I think difficult is too mild a term to describe my efforts at removing
> the orange mask in photoshop.  I have a H.P.photosmart scanner which
> automatically
> removes the mask when scanning 35mm negs.
> However I have a few medium format shots which won't fit into the
> 35mm slot and have scanned these using the photoscanner.  The
> problem then is to get rid of the mask.  What does the H.P.software
> know that I don't.  Suggestions gratefully received.
> Thanks Phil Caine
>
>
>
>
>
>
>
> ------------------------------


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