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Blue screen problem
Hello.
I am having a problem with a blue screen interview. The problem is that the person being interviewed is wearing blue.
When the shot was done they did’t have a green screen and now I am trying to work out the most painless way of sorting this out.
I’m quite new to keying in FCP. Is it possible to make a selection of a specific colour and then to add to that selection incrememntally.
What I mean is that the blue on the persons shirt is quite a lot darker than the blue on the screen.
Any ideas appreciated. -
7 Replies
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Change the hue color of the shirt, and the key out the blue back ground: thats the best way
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IF they are wearing blue, and the screen is blue, and you want to key blue…you are pretty much SOL. Unless you get deep into rotoscoping around the subject, the key will affect his clothes.
The thing to do when you find the subject is dressed the same as your background that you intend to key is to get them a change of clothes. Fixing it in post in this case is more difficult than getting a change of clothes.
Shane
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http://www.LFHD.net
Read my blog! -
[Stephen Fenn] “I am having a problem with a blue screen interview. The problem is that the person being interviewed is wearing blue. “
Yes, that is, indeed, a problem.
One that should have been addressed at the camera-shoot level with lighting and any other means (like changing shirts with another person.)Is this DV (harder to “key”) or is it a higher color-sample format (like BetaCam)?
Regardless…I assume the shot is a lock-down, otherwise the background would “float” as the camera moved.
This is to your advantage because (using Photoshop or similar) you can pull a freeze-frame of the shot and DRAW a matte-mask around the shape of the blue clothing.
Then “feather-edge” it and make that part of your key on a new layer.If the talent moves within the shot so as to “escape” the matted area, you may need to make other masks for the talent’s various position extremes, and dissolve between them as needed. (Ugh!)
This is one of those “we’ll fix it in post” problems that can be very time-consuming to “fix.”
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[Shane Ross] “The thing to do when you find the subject is dressed the same as your background that you intend to key is to get them a change of clothes. Fixing it in post in this case is more difficult than getting a change of clothes.
“Cross-posted the same ideas.
It Should Have Been Fixed at the Shoot…
the editor’s theme song. -
How are you going to change the hue of a BLUE shirt without changing the hue of the BLUE background?
Shane
GETTING ORGANIZED WITH FINAL CUT PRO DVD now for sale!
http://www.LFHD.net
Read my blog! -
Charge by the hour.
If you have Shake, you can rotoscope the shirt out, & feed that into the key as part of a hold out matte (aka core matte). Expect to spend more or less time depending on how much the camera & interviewee moved.
[Stephen Fenn] “When the shot was done they did’t have a green screen and now I am trying to work out the most painless way of sorting this out. “
There is no excuse: https://www.photoflex.com/Photoflex_Products/FlexDrop2/index.html
Arnie
Now in post: Peristroika, a film by Slava Tsukerman
https://www.arniepix.com/blog -
We just had a similar problem where a dancer was wearing a green scarf in front of a green screen (how did nobody notice).
Our compositor airbrushed it light brown frame by frame.
The scarf had a lot of tassels… He didn’t speak to me for a week but it worked.
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