pcalvin
Level 1 (17 points)
Mac OS X

Q: How can I remove or reduce moire in FCPX?

I have a few clips shot with a Nikon D800 that show some moire. Is there a way to remove or reduce this? Or is it even possible?

 

Thanks

Posted on Jun 22, 2015 12:32 PM

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pcalvin

Q: How can I remove or reduce moire in FCPX?

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  • Helpful answers

  • by David Bogie Chq-1,

    David Bogie Chq-1 David Bogie Chq-1 Jun 22, 2015 1:22 PM in response to pcalvin
    Level 7 (25,792 points)
    Video
    Jun 22, 2015 1:22 PM in response to pcalvin

    Moiré is an artifact visible from interference between two frequencies. In your case, the video has some horizontal pattern that is conflicting with the scan lines on your display. The artifact may not actually be there on a finished movie since FCPX's viewer scales. But, you change the freq of one of the sources and the moiré usually goes away or is diminished. You can scale the video a few percent or you can apply one or two pixels of blur or both.

    Before you do that, try to be sure it's not just a weird manifestation of your editing monitor.

  • by pcalvin,

    pcalvin pcalvin Jun 22, 2015 1:29 PM in response to David Bogie Chq-1
    Level 1 (17 points)
    Mac OS X
    Jun 22, 2015 1:29 PM in response to David Bogie Chq-1

    I tried both, but the moire is still there. I thought there might be a way of handling it in video because both Lightroom and Capture One have local adjustmets that remove moire. I see it on both the laptop and desktop monitor.

  • by David Bogie Chq-1,

    David Bogie Chq-1 David Bogie Chq-1 Jun 22, 2015 1:30 PM in response to David Bogie Chq-1
    Level 7 (25,792 points)
    Video
    Jun 22, 2015 1:30 PM in response to David Bogie Chq-1

    Forgot to mention if you scale up,say, two percent, you can move the image up or down a pixel or fraction of a pixel or even rotate it slightly, That reduces the interference.

  • by pcalvin,

    pcalvin pcalvin Jun 22, 2015 1:42 PM in response to David Bogie Chq-1
    Level 1 (17 points)
    Mac OS X
    Jun 22, 2015 1:42 PM in response to David Bogie Chq-1

    Thanks, but its still there.  Screen Shot 2015-06-22 at 2.33.47 PM.png

  • by Meg The Dog,

    Meg The Dog Meg The Dog Jun 22, 2015 2:11 PM in response to pcalvin
    Level 6 (11,158 points)
    Video
    Jun 22, 2015 2:11 PM in response to pcalvin

    Is the shot static or in motion?

     

    MtD

  • by pcalvin,

    pcalvin pcalvin Jun 22, 2015 2:13 PM in response to Meg The Dog
    Level 1 (17 points)
    Mac OS X
    Jun 22, 2015 2:13 PM in response to Meg The Dog

    Static.  A lock off shot. The motion is the activities at street level.  The moire is in the window and the ledge above.

  • by David Bogie Chq-1,Helpful

    David Bogie Chq-1 David Bogie Chq-1 Jun 22, 2015 2:33 PM in response to pcalvin
    Level 7 (25,792 points)
    Video
    Jun 22, 2015 2:33 PM in response to pcalvin

    That moiré was recorded that way, interference was caused by the blinds interacting with either your sensor or horizontal lines on the glass. That, I'm afraid, you live with. However, have you tried searching for moiré reduction filters? There might be something from FxFactory for After Effects or Motion. Might be worth $50?

     

    Please come back and let us know if you find something useful.

  • by pcalvin,

    pcalvin pcalvin Jun 22, 2015 2:35 PM in response to David Bogie Chq-1
    Level 1 (17 points)
    Mac OS X
    Jun 22, 2015 2:35 PM in response to David Bogie Chq-1

    That's what I thought I'd need, a plugin of some sort. 

  • by Meg The Dog,Helpful

    Meg The Dog Meg The Dog Jun 22, 2015 2:49 PM in response to pcalvin
    Level 6 (11,158 points)
    Video
    Jun 22, 2015 2:49 PM in response to pcalvin

    In the screen shot you posted, the moire is appearing as variations of color (caused in the case of the windows by the horizontal lines in the blinds) - is that correct?

     

    Not sure what the procedure would be in FCP-X but, at least to correct the moire in the windows, I would export a frame from the editor, and take that exported frame into Photoshop, and in Photoshop cut a matte in for the areas where the moire is visible.  Import that matte into the editor, and then use the matte to composite an identical image where the saturation had been pulled back to near monochrome so the color ringing is less apparent.

     

    MtD

  • by pcalvin,

    pcalvin pcalvin Jun 22, 2015 2:52 PM in response to Meg The Dog
    Level 1 (17 points)
    Mac OS X
    Jun 22, 2015 2:52 PM in response to Meg The Dog

    Thanks for the suggestion.  I tried using the masks in FCPX and reducing the saturation,  The problem thereis that the masks aren't very accurate.  I'll try you idea and move it to Photoshop.

     

    Thanks.