Comments

EPsymp wrote on 2/26/2003, 8:48 PM
Depends on what you're filming. I think green might be a little better, not for any technical reasons i know of, just the color is a bit less common.
wcoxe1 wrote on 2/26/2003, 9:06 PM
Not many actors show up wearing bright green shirts, whereas blue might make an appearance more often. Course, on St. Pattie's day, . . .
Nat wrote on 2/26/2003, 9:09 PM
Hehe great thanks, I guess i'll go for green.

I did a test with a green pillow I have.
I had more success keying the background using the secondary color correction than the chorma key....

Pretty funny.
richard-courtney wrote on 2/26/2003, 10:58 PM
Why limit yourself to painting walls and floors....
Take a look at CHROMATTE by Reflecmedia
http://www.reflecmedia.com/Chromatte/chromatte%20template.htm
you can change the LED color ring if needed.
dvdmike wrote on 2/26/2003, 11:20 PM
Nice demo for the Chromatte system, but how much does it cost? No pricing on the web site, so it must be expensive?
rmack350 wrote on 2/26/2003, 11:49 PM
Generally, a stage paints the cove wall to order - blue, green, black, white. Or you can get a cloth screen to stetch on a frame. The good ones are green on one side and blue on the other.

The bad ones have been walked on by everyone and are now filthy.

Rob Mack
richard-courtney wrote on 2/27/2003, 9:02 AM
Follow the links to the reseller's websites.

The LED rings are not bad. The real cost comes into play with the cost of the
fabric. It depends on how big a set you need. ChromaFlex portable was listed
for $1995. But considering how much extra lighting equipment and electricity
you would need just to properly light a chromokey set..... reasonable.

Keep in mind that since you are post editing you can shoot smaller segments
and composite them together with a matte layer. You can create a blue or green
matte using your graphics editor. Use the eyedropper function from a screen grab
to get the correct color. Please note that with full floor shots the special beads
reflect less light and you need to adjust the keyer setting wider.
pike_bishop wrote on 2/27/2003, 9:25 AM
It's best to use green, as the DV signal carries twice as much information about the green part of the picture as it does on the blue or red.

jsanfilippo wrote on 2/27/2003, 9:32 AM
I've done a fair bit of chromakeying with DV. As pike mentioned, green is definately best. I used blue in the past - not so hot!

Do some searching and phone calling - there are suppliers that carry green screen fabric - i bought a 6x8 unhemmed sheet of green screen material in Toronto for $100 Canadian. It works beautifully. When I was searching, I saw numerous US suppliers of green screen cloth.

My material is polyester, which does resist wrinkling... but I've found that wrinkles don't seem to matter all that much.... light the drop well enough, pull your subject 15 ft away from it, and light your subject from three directions (left, right, and behind off the shoulder for a bit of "edge") Use umbrellas or softboxes if possible!

jsanfilippo
watson wrote on 2/27/2003, 10:38 AM
Lighting is much more important than color. Blue or green can be keyed fine. Hair can be troublesome if it is fine and feathered as opposed to tighter to the head and thick.
Fast movement can also be a problem with DV chromakey.

Take your time and do a few tests before you get to far into a shoot like this.

W
Erk wrote on 2/27/2003, 11:01 AM
I recently bought a green screen from the link below, Belger Photography in Texas. Found them after searching/shopping on the web. 6 ft. x 12 ft, $72, best price I found I think. Haven't had much time to play with it yet.

http://www.belgerphotography.com/index.cgi?PageToView=catalog&Department=77231&Cartid=32721042752611&Merchant=belgerphotography&ExpandedDepts=102700|77223
Nat wrote on 2/27/2003, 11:45 AM
Thanks for the info.

After a bit of research I think i'll go for Rosco Green paint. It's about 40 $ the Gallon and I can paint lots of things with that. I already have lots of lightning since i'm building the screen for a small television studio.

Thanks,

Nat
vitalforce2 wrote on 2/27/2003, 12:02 PM
Industry wisdom is: Blue for film, green for video. Period. Many warn to take care that the green background is evenly colored and evenly lit.