Constraining Secondary Color Corrector

richard-courtney wrote on 2/7/2006, 6:54 AM

Have a chromakey scene where subject (a puppet) moves close to area
that I need to key out. In the shot, the arm of the puppeteer is the same color
as the puppet.

Any method of constraining the area of the color I want to change?

I could reshoot the scene with a green sleeve, but this would be a good learning example.

Comments

JohnnyRoy wrote on 2/7/2006, 7:32 AM

For that particular clip I would use a garbage matte because it’s mostly a static shot. Just use a Bezier mask to cut out the arm. Animate it with a few keyframes to follow the puppets movement but that should just affect the left side of the mask.

~jr

Spot|DSE wrote on 2/7/2006, 7:35 AM

Because the arm and the puppet are so close in color, coupled with the compression of DV, I'd look at a different app than Vegas to really nail this down, or else plan on a lot of keyframing with Bezier masks. If it wasn't for the arm, this would be simple. If the sleeve went all the way down, this would also be simple.

richard-courtney wrote on 2/7/2006, 12:17 PM

Anything come to mind?
(free trial for a few days)

If there was some way of automating the anchor points
of the bezier curves, such as looking for the shadow of the puppet
head, I'd have it. This would be also great for those times when
one couldn't do callbacks!

Thanks for replying/

Spot|DSE wrote on 2/7/2006, 1:14 PM

You could do this easily in Boris or Combustion, but you've also got a learning curve there. Maybe someone in this forum would volunteer to do it for you?

The arm doesn't move much in the couple seconds you uploaded, if it stays there most of the time, it shouldn't be too tough to mask, and then insert a new shadow for the puppet?