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Chroma key clean up

Posted: Mon, 19th Oct 2009, 2:09am

Post 1 of 3


Force: 0 | Joined: 19th Oct 2009 | Posts: 2


I am new to CompositLab, I have a green screen video, and I have used the chroma key and spill suppression and it looks great EXCEPT for a few grainy areas of black pixels that show up at the bottom left of the video. I'm not sure how to "clean" these problem areas. I used CompositLab a year or so ago and I remember I read somewhere to turn the background red to spot these problem areas, but I don't remember what I did to fix these areas.
I've looked through the tutorials and forums but have not found this exact issue.

Any help would be appreciated,
Posted: Mon, 19th Oct 2009, 2:22am

Post 2 of 3


Force: 5436 | Joined: 29th May 2005 | Posts: 1513

VisionLab User VideoWrap User PhotoKey 4 User MacOS User

Gold Member

You can use a garbage matte to erase a defined area.

Check out the compositing video tutorials, specifically the last one titled 'Garbage Mattes'.
Posted: Mon, 19th Oct 2009, 1:20pm

Post 3 of 3


Force: 0 | Joined: 19th Oct 2009 | Posts: 2


Thank you very much, that did the job, I had to adjust the garbage mattes for certain frames as my subject shifted slightly as she was doing her presentation. The grainy areas were close to her shoulders. Just thought I would mention that in case anyone else had this issue.
Thanks again for the speedy response!