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DPChallenge Forums >> Tips, Tricks, and Q&A >> Chroma key Green and HAIR
Showing posts 1 - 9 of 9, (reverse)
10/31/2005 09:39:04 AM · #1
I am having an awful time getting portraits to turn out really good using a chroma key green backdrop. Every time I remove the green I seem to end up with removing some of the persons hair or the green kinda fades into the persons hair. Any help on editing or lighting to fix this problem would be greatly appreciated.
10/31/2005 10:21:10 AM · #2
I also would love to know how this is done properly... I ended up selling my chroma backdrop because I never could get it to work, but if I knew how, I would try it again in a heartbeat!
10/31/2005 10:28:08 AM · #3
I also have some chroma key backgrounds and CDs that are gathering dust. Seems I'm limited to shooting portraits of completely bald people, and damned few of them want their photos taken.
10/31/2005 10:40:51 AM · #4
Now you know why the vast majority of pro photographers don't use chromakey setups. They are far too time consuming.

You could check to see if there are trial versions of advanced chromakey plugins, like Primatte or Ultimatte's AdvantEdge which are specifically designed for chromakeying.

But the best solution to having an "infinite" number of backdrops is through the use of a product called The Scene Machine. It is sold by Virtual Backgrounds. You can have your subject posing in front of anything (including your own scenes), and the entire image -- subject and background -- is captured by the camera at the time of exposure.
10/31/2005 10:53:52 AM · #5
I don't do any chroma key in still photography, but in my other life (the one I get paid for) I make documentaries. I use chroma key quite a bit in that business. The key to a good chroma key is lighting. You need good seperation from the background, and you have to light the screen very evenly. A hair light is essential. When I do chroma key, I use 6 lights. One key, one fill, one back light, a hair light (usually with a thin sepia gel to counteract any green that might be bouncing back) and two lights on the screen itself. It is not easy, but can be done for a good effect.

10/31/2005 11:49:50 AM · #6
like fstopopen said, the key is good lighting. Make sure there is plenty of separation between the screen, and the subject. Don't let the subjects light bleed onto the screen, and visa versa.

Make sure the screen is as even with light as possible.

Also, using the select color option in PS is an easy way around green screen if the lighting is perfect, and there is not alot of detail. BUT, if there is alot of detail such as hair, learn to manipulate in Alpha channels.

"Digital Compositing for Film and Video" by Steve Wright printed by focal press is a great starting point to learn Alpha Channel manipulation.

Good Luck.
01/25/2011 06:57:45 AM · #7
You're going to want to make sure you have a very good back lighting on the hair...this will put a separation between the models hair and the green screen.
01/25/2011 07:28:52 AM · #8
Originally posted by NathanWert:

You're going to want to make sure you have a very good back lighting on the hair...this will put a separation between the models hair and the green screen.

This is a 5+ year dead spam necrobump :)
01/25/2011 09:26:41 AM · #9
LOL...hadn't even noticed.
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