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Controlling RC Helicopters is hard. With a mounted camera and videolink etc its harder. This is more a question than an idea.
I am thinking of some kind of transmitter weared by, say a skiier, that keeps him autocentered in the frame, to make the shooting from an RC helicam easier (the kind that
rotates 360 degrees (not the helicopter, stupid; the camera)).
Kind of like that hockeypuck used in NHL(?) some time ago. reciever could be either the radiocontroller, or a separate cameracontrol.
Radio transmission would be cool, then you could use avalanche transmitters, often integrated in goretexjackets etc, for the autocentering.
Dont know if radio is the way to do it, you have any ideas?
Kevin Warwick
http://www.wired.co.../news/2000/09/38467
Search for "marathon-running" [coprocephalous, Feb 27 2009]
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100hz cam with some onboard intelligence, 50hz shutter that goes from black ir-transmissive filter to clear, ir-blocking, ir source on the skier (say, an LED on the helmet) ->voila! |
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The camera sees only darkness half the time, with a little dot (the LED) and the onboard intelligence (probably does not even have to be an fpga, depending on how good the initial contrast dot/surroundings is) adjust the servos so that the dot is always centered. The other half of the time, the camera sees just the normal picture, 50hz being enough for video. |
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If no 100hz cam is forthcoming, or the filter too expensive same thing with two cameras, one of which is a normal video cam, and the other some cheap-as-dirt ccd with ir-only filter. |
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I guess homing in on a radio signal would require much more elaborate equipment |
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//ir source on the skier (say, an LED on the helmet)//
Plus there's the potential Kevin Warwick Effect from that big IR source in the sky. |
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Sorry for the spelling, miasere. English is not my first language. |
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About the IR comments: will the suns radiation be a problem with this? |
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could other tracking techniques work better?
example: helmet with accent color and some kind of color/contrast locking/tracking? |
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//will the suns radiation be a problem with this// That's the Kevin Warwick Effect - link coming soon. |
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if color tracking works, ir tracking works too, as ir is just another color _ difference being that ir we do not need, so skier would not have to wear brightly pijnk helmet, but instead a little led, that would seem to be off in normal video. sun glare can be a problem, especially in reflective environment (snow...) but you with the two-cam solution you could have the led flashin, and the tracker cam only looking for flashing lights, which would do some good. |
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If it is mostly dark skier on white snow the tracking might even work with only one cam looking for the darkest object in the pic. |
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