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1. Re: Methods for keying footage with a white background
Dave LaRonde Mar 23, 2012 3:11 PM (in response to zer0hvk)1 person found this helpfulThe only thing I can recommend is this: minimize your aggravation.
Put that bottle in the background on the left side of the screen, where there are no tiny droplets. on a separate layer, roto around the splash that comes out of the glass, and THEN use the blending modes on it.
This shot won't be any piece of cake.
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2. Re: Methods for keying footage with a white background
Rick Gerard Mar 23, 2012 4:12 PM (in response to zer0hvk)1 person found this helpfulThe first place to look is the color channels. Look at Blue. It's almost a perfect matte just the way it is. Invert it and a little levels call and you should be good to go.
There are a bunch of ways to adjust the blue channel. The easiest is probably with Set Channels and Levels. The simple approach is to use Set Channels to set the alpha to the blue channel then use a levels call to the alpha channel and adjust the black , white and gamma points to make the alphe look the way you want it to look.
Another way would be to use the levels call first on the blut channel, then apply Set Channels. The quality of the preview is so poor that I don't know which way would work better.
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3. Re: Methods for keying footage with a white background
Mylenium Mar 24, 2012 12:32 AM (in response to zer0hvk)1 person found this helpfulAnything that has lots of white and a distinct foreground color can be unmultiplied based on luminance. Channel Mixer, Shift Channels and a variety of otehr effects are your friend. Combined with adjustments this is pretty straightforward...
Mylenium
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4. Re: Methods for keying footage with a white background
zer0hvk Apr 2, 2012 12:47 PM (in response to Mylenium)This took me a long time to answer, but thanks a lot, everyone!
When we bought the footage (1080) things flowed much better, and thanks to your instructions I finally got a hang of KeyLight.
Thanks a lot for your useful answers, You guys are amazing. I'm learning so much here.