Has anyone worked with that blue or green fabric that is for editing out backdrops so you can super impose a image on it?
Not sure what it is called... But you stand your subject in front of it, take the picture and then you can edit the background into anything else...
My real question is, is that fabric better or different than just using a white backdrop and doing the same thing?
Did I write this coherant enough? I am not sure...
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Blue fabric? - Backdrops
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by Max on May 3rd, 2004, 3:28 pm
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by grsphoto on May 3rd, 2004, 7:40 pm
The fabric ( or paper) is chromeakey blue or green.
It works ok in TV land because those colours ( espically the green) don't usually show up in most peoples clothes and faces. The electronics are designed to replace images on the fly. But ( and it is a big but) the people have to be back lit ( hair lights, rim lights) and far enough away from the background that there is no spill onto the subject.... otherwise part of them disappear as well.
I find it is better in photography to use a high key lighting on white, so that if there is any spill the subject doesn't get a green colour cast.
grs
It works ok in TV land because those colours ( espically the green) don't usually show up in most peoples clothes and faces. The electronics are designed to replace images on the fly. But ( and it is a big but) the people have to be back lit ( hair lights, rim lights) and far enough away from the background that there is no spill onto the subject.... otherwise part of them disappear as well.
I find it is better in photography to use a high key lighting on white, so that if there is any spill the subject doesn't get a green colour cast.
grs
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by KHatch on May 4th, 2004, 5:13 am
I have a chromakey green that I use once in a while. Glenn is right, you have to be right on with your lighting or you get blowback/spill and at minimum you could get some green fringing around your subject. White or gray will work fine as long as the clothes aren't white or gray - making it a little more difficult to extract.
Michael Campbell, who does this all the time just uses a gray background, sometimes not even completely behind the subject.
Michael Campbell, who does this all the time just uses a gray background, sometimes not even completely behind the subject.
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by Chuckster on May 31st, 2004, 5:26 pm
Max
I use both blue and green backgrounds all of the time. I took me a long time to initially set the lighting and zero my camera. Once that was done its been very easy to edit.
I even have a 30 ft deep swimming pool painted chromic blue that I shoot in. The lighting is from topside and mirrors are used in the water to light the subject and background.
Otherwise, a little patience any solid background can be used successfully. There are a lot of plug-in programs that will help you to isolate your subject(s).
Chuckster
I use both blue and green backgrounds all of the time. I took me a long time to initially set the lighting and zero my camera. Once that was done its been very easy to edit.
I even have a 30 ft deep swimming pool painted chromic blue that I shoot in. The lighting is from topside and mirrors are used in the water to light the subject and background.
Otherwise, a little patience any solid background can be used successfully. There are a lot of plug-in programs that will help you to isolate your subject(s).
Chuckster
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by wnymodels on May 31st, 2004, 6:39 pm
I am no expert with photography, but I know a little bit about doing this with video....
I am assuming the probelms and situations are similar and the 2 biggest concerns I see with this is: first making certain that the subject is not wearing the color of the chromakey background (blue or green whatever you have) and the second huge issue is shadows... depending on what background you are going to use... with video it's easier to make sure that the setting has no shadows at all, having shadows in video creates countless hours of work and it can be done without shadows if the scene setting and lighting make it appear realistic... but with photography shadows might be good to have if it's done right.
I am assuming the probelms and situations are similar and the 2 biggest concerns I see with this is: first making certain that the subject is not wearing the color of the chromakey background (blue or green whatever you have) and the second huge issue is shadows... depending on what background you are going to use... with video it's easier to make sure that the setting has no shadows at all, having shadows in video creates countless hours of work and it can be done without shadows if the scene setting and lighting make it appear realistic... but with photography shadows might be good to have if it's done right.
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