Posted: Tue, 17th Jul 2007, 7:27pm
Post 1 of 5
I was wondering if you can take a shot with an actor and a clean plate. And set them on top of each other. And change the compisite to difference and some how make an artificail green screen.
What i am basicly saying is can you seperate and actor from its background using a clean plate.
Sorry if I making it hard to explain.
Posted: Tue, 17th Jul 2007, 7:43pm
Post 2 of 5
Separating an actor from the background without keying requires a lot of time-consuming masking. In general, the whole point of a greenscreen is to make this very labor and time-intensive process much easier and quicker.
There are technologies being developed that do make background removal without a greenscreen easier, but if you are working with CompositeLab, greenscreen is the way to go.
Posted: Wed, 18th Jul 2007, 5:31am
Post 3 of 5
Ok, I just saw a video of another program and it was able to seperate the actor from the background. Luckily I have a green screen.
Posted: Wed, 18th Jul 2007, 12:23pm
Post 4 of 5
I think you are meaning a difference matte. This is where you film a background plate and then film the same shot with your actor/subject moving in front of it.
The program then analyses the two shots and removes all elements which are identical in both shots. Here's a guide to how it works from Adobehttp://livedocs.adobe.com/en_US/AfterEffects/8.0/help.html?content=WS3878526689cb91655866c1103a9d3c597-7b4b.html
and here's some tips on filming when using the techniquehttp://www.digitalvideofuel.com/filmingdiff.htm
Posted: Mon, 3rd Sep 2007, 12:41pm
Post 5 of 5
u can use a mashk a roungd the person to cut them out but u have to edit the mask each frame.