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Photo Restoration Repairing damaged photos

How to match colour exactly

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Old 11-17-2005, 06:34 PM
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Panpan Panpan is offline
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I tried by the numbers but I got nowhere, so I eyeballed it.

I think there is a difference in saturation. A hue/saturation adjustment layer with -1, -6, -4 to the right-side image gave me good results.

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Old 11-17-2005, 11:33 PM
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rnbluvva rnbluvva is offline
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I have no advise to offer regarding your problem but I wanted to say that I think what you did with burning shadows in here and with the retouch in general is gorgeous.

Great work!
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Old 11-18-2005, 04:01 AM
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Stroker Stroker is offline
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Matching colour in RGB mode is very difficult. In LAB, tweaking just the AB curves should make things easy.
Mostly agree about RGB, but slightly don't. Possible, but have to get rather hardcore. What's really fun is doing 3 point translation and using the Histogram. Bit long winded considering that there are easier options.

Yeah, easier options like Lab. Definitely agree with that. In Lab, rather trivial to pull out Lightness, tweak, and put back in.

Now, doing the colour work in Lab might be tricky if you're not familiar with the ideas. Read Steve's Intro to Curves. On the 3rd page, Steve gives an excellant example of translating colours to get rid of colour cast, but the idea for matching fleshtones is the same.

I also have some home-brew Lab filters that would make short work of this kind of Lab colour stuff. If you've got the yarbles for it, try Major ab Balance or 3Pxab Trans. One of these days I'll work on some real tutorials for those.
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Old 11-18-2005, 05:01 AM
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Colour matching in LAB mode

shelby, I'm going to insist a bit here....

This is what I would do:
1) Change to 16 bit mode (maybe not strictly necessary, I just feel more comfortable when in LAB);
2) Change to LAB mode;
3) Take a reading of the A and B numbers from some representative mid-range point in the target photo. The exact place doesn't matter because the AB numbers don't vary much;
4) Take a reading of A and B from a similar place in your working photo;
5) Use one point on each curve to fix the A and B numbers, don't touch the L(uminosity) channel;
6) If you are correcting an overall colour cast then you're done. If just the skin tones, then put in another point at 0,0 on both the A and B curves.

(worth a try )
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Old 11-18-2005, 11:25 AM
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shellby shellby is offline
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ok will get onto that...


I didn't do the retouching... I will be working on the original unretouched image actually....
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