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Moire problems with my GH1 and 20mm

Discussion in 'Micro Four Thirds Forum' started by digi2ap, Jul 31, 2012.

  1. digi2ap

    digi2ap SC Regular

    63
    Jun 5, 2011
    Stratford, London
    I'd like to know if anyone has successfully dealt with this in post production. The moire in the image in question covers a section of fine mesh fencing and includes false colour (alternating blue and orange) as well as shading. I've done some searches but any advice from the knowledgeable crowd here would be welcome.
     
  2. Ernie

    Ernie SC Rookie

    18
    Mar 29, 2012
    Okay, let's start with the easiest options first. Are you sure your lens is not giving you some colour fringing? Do they show both in RAW and JPEG? What about with some other lens? Could be just a combination of both sensor and lens reaching their limit of performance in a given situation.
    Hard to say without any samples or further data.
     
  3. digi2ap

    digi2ap SC Regular

    63
    Jun 5, 2011
    Stratford, London
    Fixed it having downloaded a trial version of LR4 and made use of the new moire removal brush. So pleased that I thought I would post the samples here. I think it was an unusual situation as I've not experienced the problem before.

    Snapz Pro XScreenSnapz002. Snapz Pro XScreenSnapz003.
     
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  4. Luckypenguin

    Luckypenguin SC Hall of Famer

    Dec 24, 2010
    Brisbane, Australia
    Nic
    Do you have a close-up crop of the uncorrected and corrected moire areas? I'd be intrigued to know what Lightroom is doing on a pixel level to remove the impression of moire.
     
  5. digi2ap

    digi2ap SC Regular

    63
    Jun 5, 2011
    Stratford, London
    Those are 100% crops as the fence was quite a small detail within the whole. Not sure I can do any better than those crops above.
     
  6. Luckypenguin

    Luckypenguin SC Hall of Famer

    Dec 24, 2010
    Brisbane, Australia
    Nic
    Ah, I see. Thanks! I wasn't sure if there was any more detail to see. In the worst area of moire LR has smudged things quite a bit but I guess that wouldn't be very noticable in the full-size image. It's also interesting that it hasn't touched the last piece of moire over the top of the railing, probably something to do with there being a non-uniform background.
     
  7. digi2ap

    digi2ap SC Regular

    63
    Jun 5, 2011
    Stratford, London
    Don't discount that I may have done a heavy handed job on this as well as missed out working on one or two bits!