Image Based Keying without Greenscreen? Good Image-Difference Key?

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  02 February 2011
Smile Image Based Keying without Greenscreen? Good Image-Difference Key?

Hi there

I'm pretty new to Nuke - so hope u don't mind a Beginner-Question.

I can't make up how to key it out:

1. I got a Clean-Plate, an image-sequence without the Actor (no green-/ or bluescreen)

2. The Actor in front of the same plate. Nothing changed, Lighting is the same, camera angle the same.

I have different plates with the Actor, want to mix them together into one (like this "multiple-personality-thing" :-) )

I saw that IBK is capable of bad greenscreen-keying, but there is no greenscreen - but it should be "image-based". It's more like a difference key - while the difference key doesn't bring up a good result.

Is there a way keying this footage without rotoscoping by hand?

best regards,
  02 February 2011
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