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Re: Shooting a monitor - how to remove strange rainbow flicker / scan line using AE

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Andrew Somers
Re: Shooting a monitor - how to remove strange rainbow flicker / scan line using AE
on Sep 2, 2018 at 11:23:50 am

Because you're shooting a computer screen closeup, I think this is similar to a Moiré artifact. What I think is happening is the detail of the LCD pixels is interfering with whatever debayering algorithm you are using, resulting in the rainbow red artifacts.

Normally the way to get rid of Moiré in an RGB image is to use a notch filter, but I don't know how you'd do that with a RAW image that has not be debayered yet — I don't see such a setting in Redcine...

MAYBE: If you export separate Red, Green, and Blue (mono channels, turning down the other two color completely) and then combine them as separate layers...

If you can upload a single frame, I could experiment with it...

Andrew Somers
VFX & Title Supervisor
http://www.GeneralTitles.com


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