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[CS6] Keying blurred elements (Bokeh on bluescreen) (Footage included)

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Roger Maus
[CS6] Keying blurred elements (Bokeh on bluescreen) (Footage included)
on Dec 15, 2016 at 10:53:01 pm

Hi there,

so I am keying footage shot in front of a bluescreen. Several elements are out of focus. I am struggling to get the key right.

Original footage:






Keying so far:


Problem here: the blade of grass, trees in background


Problem here: the egg


What I did is a key that consists of two layers:
One a bit shrunk one above, which is like the inner key, this gets the color right.
One laying underneath, which deals with the edges. I adjusted the despill bias, which gives me nice blurred edges, but makes a lot of other parts of the images opaque too. And it messes up the colors of the inner parts.


How do you deal with heavily blurred footage?


Here is the original footage in hires, if you want to try:

http://julianquitsch.de/temp/online/scene01_raw.tif
http://julianquitsch.de/temp/online/scene01_key.tif
http://julianquitsch.de/temp/online/scene02_raw.tif
http://julianquitsch.de/temp/online/scene02_key.tif


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Dave LaRonde
Re: [CS6] Keying blurred elements (Bokeh on bluescreen) (Footage included)
on Dec 15, 2016 at 11:02:27 pm
Last Edited By Dave LaRonde on Dec 15, 2016 at 11:12:42 pm

You may want to use Keylight to make a MATTE. In fact, you already have the makings of one. Your solution of using 2 layers, one for the edges and one for the core will do it. Don't worry about the off colors.
Precomp those two keyed layers, and use the result as an Alpha Matte on the original unkeyed footage. The transparency comes from the matte, with no affect on the original footage's color.
Success should ensue.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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