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Pierre Jasmin
Re: Green Screen
on Feb 14, 2010 at 2:03:25 am

To know what software/hardware you have would be useful.

One of the key to straight forward chroma keying is proper uniform lighting of the green screen.

A second variable is the type of camera and compression method used:

a) video noise (a lot of CMOS cameras tend to produce noisy video under not enough lighting)

b) the way the camera + codec ends up encoding chroma subsampling
- for example 4:2:0 with fields as a capture method for keying is probably asking for trouble (might create hard to get rid of fringes on the key edges)
see http://en.wikipedia.org/wiki/Chroma_subsampling
as a reference for "chroma subsampling"

Pierre
RE:Vision Effects



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Current Message Thread:
  • Green Screen by Thomas Hughes on Feb 13, 2010 at 2:56:29 am
    • Re: Green Screen by Pierre Jasmin on Feb 14, 2010 at 2:03:25 am





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