Luminous Landscape Forum
Raw & Post Processing, Printing => Digital Image Processing => Topic started by: Paul2660 on May 15, 2008, 03:44:11 pm
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What are others using for pattern moire in fabric? I have a number of shots taken for a office president and on the blue shirt, I have large moire patterns. These were taken with a 1ds MKII, which generally does OK, but this time, with the flash and the blue shirt I picked up consider pattern moire.
I tried the Phase one filter and it really had no effect on these images. The files were taken raw, so if anyone can recommend a converter software that might work better I would be open to that also. I used ACR 4.3 and Capture One 3.7.8. for my conversions.
The shots are going to be printed at around 18 x 24, so the patterns will show up.
Thanks
Paul C
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not a quick solution but following Russell Brown's tips: http://www.russellbrown.com/tips_tech.html (http://www.russellbrown.com/tips_tech.html)
he shows how you can paint out the pattern
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If the subject could remain perfectly still for half a second, you could possibly shoot two exposures and blend them. That tends to also get rid of moires fairly reliably.
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Lightstand, where on Dr Browns site does he talk about moire reduction? I have looked over that link a few times but never found any of the video directed to Moire. It must be there somewhere as many people have referred to it being on his site.
Thanks
Paul C
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Paul,
It is under the CS tutorials.
http://av.adobe.com/russellbrown/GoAwaySM.mov (http://av.adobe.com/russellbrown/GoAwaySM.mov)
Rich
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Thanks,
I will go back and check them.
Paul
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All of "magic fix of moire " presentations
( by RB or others )
uses files with one channel that is OK ,
( and it looks impressive on shows with people applauding )
In real life - mostly - all the channels are screwed , and channel fiddling will not work ..
I'm simply astonished that from what I see there is no way to fix those things without severe blurring .
Lets go back to film :-)
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I'm simply astonished that from what I see there is no way to fix those things without severe blurring .
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Aliasing is like that. Very slight blurring *before* capture will do the trick, though, e.g., fake up a "heavier" AA filter. Of course, that doesn't help you with preexisting captures....
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Gah sometimes there really is no perfect fix for moire. Denim has caued me the biggest fits over the years. Anyways did you try the included PS Phase one pluggin demoirize? In the worst of worse situations you can duplicate the background layer or save a copy as and run the filter and then add a mask and paint out all but they affected area. It tends to zap the punch and detail in the moire areas and its not perfect but its as good as I've managed to do outside of the moire tool in Phase itself which usually works pretty decent.
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For uniformly colored objects with moire:
If there is moire visible in all R, G and B channels, usually the pattern is inverted in one channel, so with channel mixer you can "substract" the pattern, and get a patternless grayscale layer to use as luminosity. And then deal with the color separately.