Keying Problems

mm2k wrote on 12/30/2002, 11:00 PM

I shot a friend with a green background to try using the keying feature found in VV3. I found that when trying to key the green out, the subject's brightness is slightly loss & the keying is half keyed. Is This normal. I tryed keying the bkgrnd out with After effects and it did not remove the subject's brightness. Instead I had to tweak tolorances of the edegs and so on. Is this keying process really that hard, neighter program work like what I often see on movies. I ordered a Chroma green 11x10 backdrop went to home depot and had them match the color to create my background. Could that be a problem. Also I shot my subject in sun light standing far enough away as to not cast a shadow on the green. Can a consumer Cam (Sony Digital8) handle such a task?

Comments

rossf wrote on 1/1/2003, 3:30 AM

I've done a bit of experimenting:1/consumer cameras just don't have the color definition to get real good results.2/I always had better results with blue screen,but either way I found that the screens had to be lighter in color than seemed normal,the consumer camera seemed to read the sreens as darker3/If you've got enough light,try using a polariser filter to cut feflections off the screen which change the color to the camera.Also remember the software they use for the movies is pretty complicated and quite a field in itself.I've come to the conclusion that it is not possible to get exquisite results on consumer dv but it can still be a really useful thing.Search the web for sites on blue screen/chromakey

mm2k wrote on 1/1/2003, 10:03 AM

Thank you rossf