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Correct extreme blue scans

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Correct extreme blue scans

Postby Inola on Tue Jul 10, 2007 10:17 pm

I have just started scanning my old slides with my new Epson 4990 scanner. I am very pleased with the scanner, but not with some of the slides (Agfa CT100). A series from 1986 that I hadn't seen in years turned out very blue indeed.

To see an example:
http://www.benino.biz/images/Afrika010.jpg

I tried to create an adjustment layer with Photoshop CS that I can apply to all or most of the scans, but without success so far. I have used the techniques that are normally recommended: create a levels adjustment layer and determine black and white point with the eye dropper in the seperate layers or use the eye dropper to determine the gray point.

Can anyone recommend how to correct this extreme colour cast?

Thanks a lot.

Ino
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Postby Isick on Tue Jul 10, 2007 11:43 pm

There a few ways you could do it. The two biggest are
1)Manually adjust the color balance (image > adjustments > color balance) and the Saturate (image > adjustments > Hue/Saturation) and the contrast (image > adjustments > brightness/contrast) to get the exact correct colors.
OR
2) take the easy way and just press Auto Color (image > adjustments > auto color). I did a trial run on the image you supplied and, to be honest, step two yields a very, VERY nice result.

I gotta hand it to Adobe, photoshop is a very 'smart' program.
"Photoshop is a powerful tool, but like all tools it still needs a powerful artist to release its potential."
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Postby Inola on Wed Jul 11, 2007 12:46 am

Thanks for tip number 2. The simplest way indeed gives pretty good results. I tried it on several scans and it looks quite acceptable.
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