Making green screen work w/ wrong white balance

orsonk wrote on 11/25/2009, 5:15 PM
I did a video shoot with a green screen using what turns out to have been the wrong white balance value (something like 3200 K whereas it should have been 5200 K). As a result, my results are not great -- that is, it is very difficult using the Chroma Key tool to get an acceptable balance of the values that looks good.

Is there perhaps a tool in the Vegas effects tool box that can help out when you've used the wrong white balance in such a situation?

Thanks for any suggestions.

Orson

Comments

ushere wrote on 11/25/2009, 6:24 PM
can you post a still of the screen you're working on?
orsonk wrote on 11/26/2009, 12:43 PM
Do you mean a still image of one shot of the person in the video or of the person against the background I'm using the green screen for? Sorry, don't understand your request.

Orson
farss wrote on 11/26/2009, 1:28 PM
the person against the background!

Select the green screen preset and change the angle of the key color to correct for the wrong WB. Do not attempt to fix the WB before doing the CK. Don't use the eyedropper to select the color either.

Bob.

kkolbo wrote on 11/26/2009, 2:19 PM
You can post a still, but a five second clip in the native format would be better. Just a link to where we can download it would be fine. I would want to see how far off the white balance is. The important thing is that there is a difference between the person and the background. The actual color does not make a big difference; just the difference between the person and the background.

KK
orsonk wrote on 12/18/2009, 3:09 PM
It turns out my solution came in using the Color Correction FX (from a user in another forum). In the Collection FX window, there are 3 color wheels; I used the right color wheel (used for white balance), clicked the left pipet under the wheel, and selected a part of my preview window that *should* be white. It worked -- I actually got pretty decent end results doing this -- thought I'd share with the forum.

Thanks for your suggestions.

Orson