Invisible Cloak Video Clips
June 29, 2006 by Vurdlak
Remember our previous post, talking on recently discovered optical camouflage techniques? Well, here are some videos that show this invention more realistic. For now, there are tow techniques I am aware of. First one, where the behind-object image is projected on the surface of the object we want to make "invisible". This requres camera behind the cloak, and prjector infront of it. The other techniques is much more complex, and I don't undrestand it fully, but it has something to do with bendng the light, and the cloak itself is capable of camouflaging it's self using some nanotechnology. Think it's doing something like chameleons are doing naturally. There is still much work arround these, but in a few years, we'll have fully operational invisible cloak. Mark my words ;) Check out the videos: Video1, Video2, Video3.
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Have you ever considered posting these videos into YouTube? "YourFileHost" is crap, and breaks in any browser but IE. I can totally understand not hosting them off your own webspace for bandwidth issues, but does it have to be there?
The changing of color in cameleons has nothing to do with camouflage. It's the "emotions" of the animal that affect is color. A bit like when a person get reddish cheeks when embarassed.
Video 3, his face should be seen on the ball and box, not the words *behind his head* Just some kids who are good at video editing and green-screen type effects.
Actually a chameleon changing of color is partly mood, and partly camoflauge. Take a gander:
http://en.wikipedia.org/wiki/Chameleon
I noticed the same thing as Right. It seemed heaps cool but its clearly a hoax and not well thought out.
Works fine in Firefox here on Linux.
We will never have these in the USA, they will be considered too likely a tool of terrorism. Welcome to the Police States of America!
@Right, Lara:
As mentioned in the summary, that effect is acheived using a camera *behind* the position, and a projector *in front* of the position. The inference is that the projector will project the image viewed by the camera - essentially a real-time, physical green-screen.
In the video you mention, the camera must be *behid* the presenter, and thus does not see him. The projector then projects this image.
bluescreen effect fairly simple
It's not a green/blue screen hoax at all.
They've had actuall presentations of this thing at conventions, although I can't find the videos of that right now.
Here's a Youtube one: http://youtube.com/watch?v=eqsN9evhMGU
I believe a photograph of the scene has been previously taken, and then it's projected very slightly back in place. The projected image cannot be picked up by the human eye.
The objects and the jacket are made out of a special material, but it's merely a form of reflection.
The effect in the video with seems like the "nano" effect. I've had some lectures on this subject, it's comparable to the refraction of light in water. The light actually bends around the object, and also around the head right behind it. In this way, you can hide things (or people) by simply putting the ball or cube in front of it. This is because light is an electromagnetic wave, which will respond to a field. By creating little "nano-currents" on the object, light will bend. I have heard about it, but assumed this was only possible on a very small scale. And I'm still not 100% convinced that this is the real "nano" effect.
Obviously, there is a green screen in the back, and the ball/block are just the same shade of green...