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Heavy Colour Cast Slides - help needed.

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  #1  
Old 04-27-2009, 05:17 PM
tmurphy's Avatar
tmurphy tmurphy is offline
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Heavy Colour Cast Slides - help needed.

Whilst working through scanning and retouching some fourteen hundred 126 slides from the early 70's I came across a batch of bought souvenir 35mm slides from my parents holiday.

They all have degraded over the past 37 years and have a severe red tint to the images. The Kodak 126 slides are still pretty much as the day they where taken

Attached is a sample image and a purely level adjusted fix. I used the threshold method to pinpoint the darkest and lightest pixels in the image and set these as black and white and pretty much guessed at the grey midpoint from some of the clouds!

The result is OK, but are there any other techniques for correcting such heavily tinted images?

Many thanks for any help

Tony
Attached Images
File Type: jpg 138scan.jpg (71.5 KB, 65 views)
File Type: jpg 138scan-fix.jpg (82.3 KB, 53 views)
File Type: jpg 131scan.jpg (74.5 KB, 64 views)
File Type: jpg 133scan.jpg (78.5 KB, 49 views)
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Old 04-27-2009, 07:04 PM
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0lBaldy 0lBaldy is offline
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Re: Heavy Colour Cast Slides - help needed.

This video is pretty interesting-- Katrin Eismann-Image Restoration, Repair & Enhancement: Extreme Color Correction
If the link does not work ... go to photoworkshop.com Scroll down to "Adobe Training Area".... click on "Tutorials" ..... Under "Software Cinema" select Adobe Cs, CS2, and CS3... Click Katrin Eismanns' name (OR as on my computer I had to click on "Rick Sammon" to bring up Katrins menu) when Katrins menu pops up ... select "Image Restoration, Repair & Enhancement: Extreme Color Correction"

Various usefull techniques and some other nice videos on that site!!
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Old 04-27-2009, 08:18 PM
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llinares llinares is offline
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Re: Heavy Colour Cast Slides - help needed.

Mostly I duped the background image and then clicked Image>Adjustments>Match Color and checked Neutralize. Then used that as starting point to add adjustment layered for Curves.
Attached Images
File Type: jpg 131scanEdit.jpg (95.0 KB, 30 views)
File Type: jpg 133scanEdit.jpg (87.2 KB, 27 views)
File Type: jpg 138scanEdit.jpg (90.7 KB, 23 views)
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Old 04-28-2009, 06:34 AM
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philbach philbach is offline
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Re: Heavy Colour Cast Slides - help needed.

Well I took a look at Katrin's video as OLBaldy mentioned. After doing that I went into lab and made more color adjustments.
Notice that there are a few areas around white bright pixel areas that have a greenish tint to them.
Attached Images
File Type: jpg UsedLab.jpg (193.8 KB, 48 views)

Last edited by philbach; 04-28-2009 at 07:04 AM.
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Old 04-28-2009, 07:02 AM
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philbach philbach is offline
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Used Curves and the Eyedropper tools

In this photo I felt that some of the stones in the left foreground would be neutral gray. The building in the background pure white and to the right side a black stone. So I placed color samplers on these areas and then using a curves adjustment layer I used the eyedroppers. White, Black, and then moved around with the gray one. That did most of the initial work.
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File Type: jpg eyedropper.jpg (194.0 KB, 41 views)
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Old 04-28-2009, 03:18 PM
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tmurphy tmurphy is offline
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Re: Heavy Colour Cast Slides - help needed.

Many many thanks for the help and pointers, the Katrina video looks excellent. I've had a very quick play with one of the images, and the results are not too bad.

I'm just glad it was only the handful of bought slides that were affected. 2 reels down 8 to go !!!

Tony
Attached Images
File Type: jpg 132scan.jpg (74.3 KB, 24 views)
File Type: jpg 2-132fix.jpg (89.6 KB, 30 views)
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Old 04-29-2009, 02:47 AM
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Re: Heavy Colour Cast Slides - help needed.

tmurphy,
I 'm not sure if this tip is in the katrin vid (I can't watch her, she bores me to tears).
Wanted to let you know you don't have to guess at the grey point.
After you set black and white points-create a new layer filled with neutral grey (do this by picking add new layer from the drop menu, not the icon, choose the overlay blend mode, press ok).
Now change the blend mode to difference, the areas that show as black are nutral grey-set your point and then delete the layer and add another curves adjustment.
Attached Images
File Type: jpg 132scan.jpg (92.1 KB, 27 views)
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Old 04-29-2009, 03:07 AM
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Re: Heavy Colour Cast Slides - help needed.

Here is another. I started the same way you did, added the grey point, added a laer set to color with gausian blur set to 5.
Added a HS layer and bumped color 20%. Finished with unsharp mask with high radius.
Attached Images
File Type: jpg 138scan.jpg (98.4 KB, 33 views)
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Old 04-29-2009, 03:39 AM
jojaspi jojaspi is offline
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Re: Heavy Colour Cast Slides - help needed.

had some reasonably good results with the Kodak ROC filter ...
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Old 04-29-2009, 04:07 AM
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marek marek is offline
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Re: Heavy Colour Cast Slides - help needed.

Grey point
1. Dup image
2. invert image
3. blur a little
4. Blend Mode : Difference
5. threshold to the most left of the histogram... the black is your grey point from the threshold view

Heres my color correction

http://img520.imageshack.us/my.php?image=95651295.jpg
http://img412.imageshack.us/my.php?image=55341478.jpg
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