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Chromakey issue: noise in dark areas after applying Keylight 2.0
After shooting my green screen interview using Reflecmedia Litering and my AF100, I brought the footage into Final Cut Pro and used Keylight 2.0 to chromakey.
But whereas the original footage is clean, the chromakeyed footage has lots of noise in the dark areas, especially to the right of the talent all over the chair leather. Please see my footage here:
Not sure what I’m doing wrong in Keylight.
Thanks in advance for any advice help with Keylight in FCP.
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5 Replies
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Sounds like you need to make more adjustments to the chromakey settings. Try expanding the sampled green color a bit. I find it helps to work separately on the luminance component and then the chroma component. Also, use garbage mattes and masks to cut away as much of the nonessential background as possible, and concentrate on making the key immediately around the talent as clean as it can get.
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Hi Mark and Dave, thank you both very much for replying and helping me out.
Dave, I don’t see any change at all after applying the alpha matte to the top clip in FCP. The noise is still there. My Keylight settings for this clip are:
Screen Gain:1
Clip White: 0.5
Screen Blur: 2.8
Clip Black: 0.43 / Clip White: 0.61
Screen Dilate: 1
Screen Softness: 0.2 -
Hi Dave,
No problem at all. I just figured it out. I had the lower clip on alpha matte instead of the upper one, my bad.
Now no noise, poof! all gone! exactly as you explained. Thanks so much for the tip! I like the humor about the gun! 🙂 -
Good day, Dave!
I have the similar problem using Keylight in After Effects, and i’ve prepared some screenshots of what i did, so please, tell me what’s wrong here.
I try to use your method: duplicate layers, then use the top one as an alpha for the layer beneath. It reduces black points as if i increase Clip Black parameter. But it doesn’t reduce the noise (i showed in screens three sequential shots and there is a lot of noise).
Here is the zip file with screens from my monitior: https://www.sendspace.com/file/tt0rzh
If you could help me, i’ll be very grateful for you!
Thanks!P.S. I don’t want to remove all the shadows of table and sofas. And i don’t want to make the floor be very clean. It should be with gray spots on it, but without this noise on theese spots.
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Hi Dave,
I was wondering if you could possibly take a look at my chromakeying work in Keylight that I posted here on Vimeo, it’s a short screencast of the noise issue I keep encountering in Keylight, no matter what I do:
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