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Old 12-16-2005, 10:10 PM
bart_hickman's Avatar
bart_hickman bart_hickman is offline
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Location: Oregon, USA
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Forget all the crud about frequency. That's the engineer blabbering.

NR = noise reduction. PSPX = paintshop pro version 10.

In the PSP NR tool, you have independent control over "small", "medium", and "large" noise. In Neat Image, you equivalently have "high", "mid", and "low". High = small = high frequency noise. Low = large = low frequency noise. Mid = medium = mid frequency noise.

The noise (aka waves) in your picture is in the large or low category (small/high noise is like film grain or digicam noise.)

So you run an NR tool and have it specifically remove only the large noise. With the PSP NR tool, you can manually choose up to 10 individual sample locations so it knows exactly what noise you want removed. I don't know if Neat Image has this feature--by default I only see one sample box and I couldn't make it small enough, so it was overlapping the curtain folds and possibly thinking those are part of the noise. In spite of that limitation, I was getting an okay result from Neat Image, but PSP was doing better in this particular situation. (IMO, the NR tool alone is nearly worth the purchase price of PSP).

Hope that helps.

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Old 12-16-2005, 11:18 PM
Craig Walters's Avatar
Craig Walters Craig Walters is offline
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i was working on this earlier at home and had some decent success. i'm not at home at the moment, but here's a suggestion. quit trying to handle the entire image as a whole. do the basic things to correct this image globally, like contrast, brightness and so on. but the waves you treat locally. and that means either masks or selections and THEN treating that area. for instance, on one of the light dresses, make a selection of the dress and then run curves or levels to smooth out the light/dark contrast waves on just that selection. by running NR globally you're marring other areas of the image while correcting another area, at least in this instance.

i also ran lightness on some of the local areas.

and, this may seem like an odd suggestion, but try reducing the image size by half. size reduction can sometimes remove or at least reduce problems of this type. do this before other treatments.


edit: oh, and try lum frequencies by Stroker. being that this is a black and white, lum frequencies can act somewhat like curves and sharpen on an image like this.
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