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Photo Retouching "Improving" photos, post-production, correction, etc.

Could any one please take a look at this?

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  #11  
Old 10-30-2004, 12:15 PM
Upke Upke is offline
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Thanks. I'll look into it. Hmmmm. I need to find someone with such a scanner.
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  #12  
Old 10-30-2004, 02:22 PM
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Gary Richardson Gary Richardson is offline
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Upke, thanks for the 100K version, it's downloaded fine, and I'll have a go as soon as possible. Don't hold out too many hopes, it's badly silvered. Previous suggestions about copying with a camera are probably the best way to go with this one.
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  #13  
Old 10-31-2004, 07:58 AM
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Neal Piek Neal Piek is offline
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Take a good look at the photo is it silvered or a lot of old dirt on it. Scanners will pick up a reflection from years of dirt. I clean most photos before I scan.
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  #14  
Old 11-01-2004, 06:50 AM
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byRo byRo is offline
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Little magic trick

Here's a little trick that sometimes works, and in this case came out just fine.

[skip if you wish]
Maths detour:
We can think of the photo as original image + noise.
A look through the 3 channels shows that the Red channel carries the image much more clearly than the Blue channel.
But we are in luck here because, while the image is different, the noise is the same.
So we have:
image(R) + noise and image(B) + noise
It's east to see that if we subtract one from the other we take out the noise and end up with:
image(R) - image(B)
If this was a unfaded grayscale original, these two would be the same and we'd be looking at just nothing. We are in luck again because the photo is yellowed, which means the Blue channel is faded. What comes out is a weakened copy of the original but now without the noise.

[/skip if you wish]

How to do (see layer palette):
- Using the channel mixer, make a monochrome copy with 100% Red;
- Make another copy with 100% Blue;
- Do a levels adjust to fix black and white points: Important MUST be exactly the same for both of the channel layers;
- Invert the Blue layer and set opacity to 50% (this is the subtraction);
- Add a levels adjust layer above these to fix B/W points of the result;
- If necessary, go back to the Blue layer and tweak the opacity (not necessary here).

Not perfect, but the noise is gone. From here, it should be possible to get to a pretty good retouched image.

Have fun!

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File Type: jpg opa-byRo.jpg (95.6 KB, 98 views)
File Type: gif opa-byRo.gif (9.2 KB, 42 views)
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  #15  
Old 11-01-2004, 07:03 AM
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Janet Petty Janet Petty is offline
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Amazed

Ro, I'm continually amazed by your approaches to problems and the wonderful results you get. But what I'm most impressed with is your ability to TEACH a technique so that anyone can follow it. That is, more than anything, a true gift. Thank you for sharing it with us.

Janet
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  #16  
Old 11-01-2004, 07:37 AM
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byRo byRo is offline
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Hi, Janet, thanks for the kind words.
I had tried this little trick a number of times, but this time the result suprised me.
(Actually I said a little "naughty" word, in Portuguese though)

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  #17  
Old 11-01-2004, 12:18 PM
Upke Upke is offline
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Thanks for all your time invested in this photo. It means much to me!

I think I've done the correct thing.

But how do I restore it further, blurring doesn't help, nor does despeckeling.

This is done with the TIFF 1,5 mb image.

Again thanks for all your time!
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  #18  
Old 11-01-2004, 09:10 PM
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cedwar cedwar is offline
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Ro...

Im very interested in your post earlier in this thread. Post #14. Could you explain a little more about how you did those steps in the 2nd half of the post? I have a picture with a LOT of noise and want to try what you suggest there.

...cedwar
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  #19  
Old 11-01-2004, 10:55 PM
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roger_ele roger_ele is offline
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Ro,

This is facinating, thanks. This means that if the two layers are not different, but the noise is lighter than image information, then the image info could be adjusted with straight line adjustments in curves without changing the brightness of the noise making the layers different - and then using your technique ... Thanks again!

Roger
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  #20  
Old 11-02-2004, 11:00 AM
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vinniesworld vinniesworld is offline
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Great results, I tried to follow, but did not receive the same results. It sure would be great if you could do a tutorial on it. I don't know what I'm doing wrong, it sure worked great for you.
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