cheap blue screen

coreyjordan · Post by **coreyjordan** » Tue Jun 13, 2006 6:33 pm

Hi everyone, I just thought that I would let you know that I have tried a blue screen out of Blue Tarpaulin and it worked pretty well. You can buy this from any camping shop or of eBay for a few pounds. It comes in all sizes fom small to big sheets. As anyone else tried this and what kind of results did you get?

Coreyjordan

Vor · Post by **Vor** » Tue Jun 13, 2006 6:52 pm

can you show us an example? i ddnt think a blue tarp would work....it would reflect the light too much....

coreyjordan · Post by **coreyjordan** » Tue Jun 13, 2006 7:45 pm

I have only done a few seconds of film with my kid stood in front of it, just to try it out. I will try it again later and for longer next time. It was an old one that I cover thing up with in the garden, it also as a few holes in it. But for a couple of pounds it worth a try.

redkorn · Post by **redkorn** » Tue Jun 13, 2006 8:42 pm

I just went to walmart and bought 20ft of green cloth material then made a wooden frame and then I just stapled the cloth to it.

DEDFX · Post by **DEDFX** » Tue Jun 13, 2006 9:11 pm

looks very nice, how much?

redkorn · Post by **redkorn** » Wed Jun 14, 2006 2:00 am

$10 for cloth materail
$40 for wood and nails and staple

Nba185 · Post by **Nba185** » Wed Jun 14, 2006 2:13 am

Wow. that's very budget. but will it work the same?

Epsilon · Post by **Epsilon** » Wed Jun 14, 2006 6:08 am

Cloth works better than paper because you can stretch out all the wrinkles and is a little more forgiving with lights and shadows. Check out photography stores. I know some offer background screens in "film screen" colors.

redkorn · Post by **redkorn** » Wed Jun 14, 2006 6:34 am

At my shop i work at for studio portraits we use a color paper as a backdrop and it works perfect!

ALove · Post by **ALove** » Wed Jun 14, 2006 7:40 am

Also pick up some lighting, you want to light your screen separate from your subject.

redkorn · Post by **redkorn** » Wed Jun 14, 2006 8:40 am

Ya thats a problem I had with my green screen i was using (4) 500watt halogen lights to try to get even lighting, ha it didnt work im uploading the video now it about 150megs, il post it soon.

Nba185 · Post by **Nba185** » Wed Jun 14, 2006 9:34 am

Which screen is more popular? the green or blue one

rhys · Post by **rhys** » Wed Jun 14, 2006 9:59 am

There both about the same but green is used mostly because people often wear blue, for example jeans.

ALove · Post by **ALove** » Wed Jun 14, 2006 10:36 am

Green is often times used because of a myth surrounding how the color information in DV is stored, supposedly in YUV colorspace the green resolution defined by the three different channels of Luma, Red and Blue. By storing those seperatelyits assumed that the compression is much less damaging, however this is not the case, it contains the exact same resolution as the Blue. However, green is better when used for darker subjects, because your value of your green in the greenscreen is at a high level, probably around 190ish. If you stick a ligh subject in front of that, with its value of something like R200 G190 B200 notice the green value is the same, and it'd key out the light hair too. Now for a light colored object, blue is preferred, because a blue value will probably top at about 150ish, where the light colored object is then once again at 190blue, theres some distinction for the keyer to separate. Of course then theres the point made above, that you don't want to be wearing the color of the screen, but its rare that someone will be wearing something as vibrant as what we're talking here. So pick your favorite, each are used equally. (I personally have green, I like to light my subjects dark.

) Now that may be a little more technical than you wanted, but oh well. Have fun.

redkorn · Post by **redkorn** » Wed Jun 14, 2006 4:21 pm

I still havent perfected the green screen but im geting closer, I think the lighting was the problem though.
http://www.snyderproduction.com/test.avi

ProdigyFilmsinc. · Post by **ProdigyFilmsinc.** » Wed Jun 14, 2006 4:40 pm

It looked good, you just need to mess around with the colors a little. If you pause and look down at his hands on the desk, they are green. So, keep it up and just mess around a little.

Nba185 · Post by **Nba185** » Thu Jun 15, 2006 2:30 am

Thanks for the explanation. I'll go get my green cloth lol