Greenscreen Help Please. For Volume work

I have been looking around to use greenscreen techniqes to do a large amount

of portraits of school kids. While I have been able to do a nice job, with

lots of post production work on hair, I don't think this will be suitable for

volume amount of work. Is there a program or add on that will remove a green

background, without having to do quite of bit of work on hair or other fine

areas of the photo. I've heard of Corel Knockout. Does anyone have any

experience with this program and can tell me how fast it will remove a

background, without having to put too much time into fixing hair. I will need

to do a lot of this. So if Corel is good, I will use it. If you know of

another software, let me know. Thanks for all your help so far. Photo.net is

Grreat!

Knockout is supposed to be good but I've not tried it.

What I can tell you is that a blue screen is easy to remove if three conditions are met. One is that it be evenly lit, another is that it be far enough behind the subject so it's not contaminating the subject with its reflected light. The last is obvious, the subject is not similiar in color to the screen.

All that's needed then is a fairly simple color selection in Photoshop.

I can't see why a green screen would be any different, and would have the advantage that most clothing doesn't come in that poisonous shade of green. Or maybe it would pay to have both colors available and place the kids according to which background would work best.

I've tried Mask Pro, and it seems to work very well.

But, I second the comments about keeping the subject far from the screen and keeping the

screen evenly lit. I have a collection of green-screen portraits taken at a recent party (not

taken by me), and the color contamination in the hair has made extracting extremely

difficult. Also, shadows on the screen result in numerous shades of green.

So: Keep the screen well-behind the subjects (10 ft. or more sounds right to me, if your

screen is big enough), and completely flood it with light.

--Marc

thank you very much. I just received my knockout 2 and it seems nice, but not made for volume amount of work. I really need something that would do a mass amount of work quickly. I'll keep looking. Thanks again!

Abe