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I want a function on my video editor where I can remove the background and leave only the subject of the video.
Normally this is done using a greenscreen (also known as chroma key) where a person stands in front of a single color screen (usually green) which can then easily be removed (and then replaced)
during editing. However this can only be done in a studio; I want to be able to do this effect with video/images taken at any location.
How to do this: a camera is set on a tripod and the background image is captured. Then the subject moves into the frame and video is taken.
Software is then used to subtract the initial image from the video. Or more accurately: any pixels that are identical in the initial image and video frame are removed.
Result: only the things that weren't in the initial shot remain.
Using this software a subject can be viewed without the distraction of a background (e.g. in sports coverage). It could also be used for special effects in the same way greenscreen is used. This could also be useful for still images.
It probably won't work as cleanly as greenscreen, but it'd still look pretty cool.
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Annotation:
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It would be cool. I imagine you'd have
problems if the background contained any
movement (waving branches, passing
cars), or if the camera weren't perfectly
stable. But [+]. |
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Baked. The webcam software that comes with OSX (predatory cat) has this. You get out of the way and start filming, then when you get back in shot you are overlaid on a beach with lapping waves, etc in real time. This doesn't work if you move the camera, although I'd have thought that should be fairly easy to implement as long as you were not near the edge of the frame. |
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Also, you could do it with moving shots with one of those computer-controlled camera rig things, but that would probably take away from the "images taken from any location" thing. |
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//Just don't wear a Hawaiian shirt in Hawaii.// |
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Or Bermuda shorts in Bermuda. |
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factoid: Panama Hats are actually from Ecuador. |
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I'm surprised no one has written a Final Cut Pro or Avid plug-in to do just this, but afaik no one has. It's probably because there's no mileage in the broadcast industry doing something that will never work perfectly. Glad to hear Apple have done the bodge. |
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And don't wear a bikini on Bikini. |
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