reducing saturated artifacts in shadows

L
Posted By
linelle707
Dec 9, 2004
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I have a digital photo of a person’s face, backlit by sun coming in a window, casting half the person’s face in deep shadow. I had overlooked it for years, because of the shadow, but recently discovered it is a wonderful photo, once the areas in shadow are lightened a bit. The entire photo is a bit noisy, but the shadowed areas have a LOT of noise/artifacts and they are all brightly colored blocks, mostly reds and greens. I would like to make them more flesh-toned, like adjacent brighter areas, while still keeping the relative lighting. Any ideas? Thanks in advance.

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B
bhilton665
Dec 9, 2004
From: "

I have a digital photo of a person’s face, backlit by sun coming in a window, casting half the person’s face in deep shadow. I had overlooked it for years, because of the shadow, but recently discovered it is a wonderful photo, once the areas in shadow are lightened a bit. The entire photo is a bit noisy, but the shadowed areas have a LOT of noise/artifacts and they are all brightly colored blocks, mostly reds and greens. I would like to make them more flesh-toned, like adjacent brighter areas, while still keeping the relative lighting. Any ideas?

http://www.neatimage.com/ … download the demo of this noise reduction program and try it, I think you’ll be surprised at how well it removes noise without softening details … there are several other similar programs but this one is inexpensive (maybe free for the minimum version) and easy to learn and use.

Bill
MR
Mike Russell
Dec 9, 2004
wrote:
I have a digital photo of a person’s face, backlit by sun coming in a window, casting half the person’s face in deep shadow. I had overlooked it for years, because of the shadow, but recently discovered it is a wonderful photo, once the areas in shadow are lightened a bit. The entire photo is a bit noisy, but the shadowed areas have a LOT of noise/artifacts and they are all brightly colored blocks, mostly reds and greens. I would like to make them more flesh-toned, like adjacent brighter areas, while still keeping the relative lighting. Any ideas? Thanks in advance.

You can reduce colored noise in a couple of ways. One very good one is to convert to Lab and run a gaussian blur (radius 10 for starters) on the a and b channels. You may find that, once the nose is removed the shadow color is better.

Put the image up on a web site and some of us will see what we can do. —

Mike Russell
www.curvemeister.com
www.geigy.2y.net
A
ajwood2004
Dec 11, 2004
QUOTE >>>
You can reduce colored noise in a couple of ways. One very good one is to convert to Lab and run a gaussian blur (radius 10 for starters) on the a and b channels. You may find that, once the nose is removed the shadow color is better.

You can also try to run a Gaussian Blur on the photo (without converting to LAB) and then fade it. Open the Gaussian Blur filter and blur the photo until the color artifacts disappear. Don’t worry about how much or how little, just watch your preview window. Once the artifacts have been blurred out, goto EDIT and select FADE GAUSSIAN BLUR. In the dialogue box, leave opacity at 100%, and change the MODE to COLOR. The blur should be removed and so should the artifacts. – A.J. Wood

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