h a l f b a k e r yPoof of concept
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There are several products out there which convert a camera such as a Gopro into a steadycam by putting it on the end of a handle with a 2-axis gyroscope/tilt sensor and a pair of brushless motors to make an external handheld gimbal mount.
However this is overkill - with the tiny size of lenses nowadays
it should be possible to put the same logic *inside* a camera, and have small motors control the movement of just the image sensor/lens module. I can easily see building a camera like this as a proof of concept prototype using a Raspberry Pi and a PiCam for example.
(Just to clarify, I'm talking about a device that can rotate the lens by maybe 100 degrees to track a moving object; I'm not talking about the few degrees that you get from image stabilization devices built in to existing cameras)
External steadycam gimbal mount
https://www.youtube...watch?v=s_P69RGeLrM
This is the existing style of product where the whole camera is held in the gimbal mount. [gtoal, Oct 04 2014]
Motors used in current products
http://www.amazon.c...gital-Camera-Gimbal
These are the relatively large motors used in external steadycam adaptors [gtoal, Oct 04 2014, last modified Dec 18 2014]
but there are much smaller motors available
http://microbrushle...ghty-midget-motors/
These micromotors designed for RC aircraft are small and light [gtoal, Oct 04 2014]
WKTE
http://asia.olympus...slr/ep5/feature/04/
[DIYMatt, Oct 05 2014]
More small motors
http://www.seeedstu...BCCM01B-p-1623.html
Small motors used in micro quadrocopters [gtoal, Dec 13 2014]
Possibly useful if anyone ever tries to build this...
http://www.operativ.../products-bgmc.html
Brushless gimbal motor controller [gtoal, Dec 18 2014]
Almost there...
http://www.raspberr...aspberry-pi-camera/
"Pi Pan" -180 degrees left/right, 110 degrees up/down [gtoal, Dec 18 2014]
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But also a question: instead of moving the
sensor/lens module, can the image not be steadied in
software? Presumably, if accelerometers can detect
the exact movement of the camera, the movie can
be stabilised in software (post-capture), as long as
the exposure time for each frame of video is
relatively short. |
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@MaxwellBuchanan - Yes, there is a lot of software out there to do image stabilization, but it is aided considerably if the camera is stable and pointing in the right direction to begin with. I would expect a good image-stabilized camera to use both techniques.
That style of correction works by having a smaller clip window taken from inside the default picture, which is moved around a little to register with the same scene in the next frame. It stops working as soon as the clip window hits the edge of the actual image. |
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Umm, isn't this Optical Image Stabilization (OIS)
which has been a feature of almost every *decent
camera (and the new iphone) for at least 10 years?
You can even buy image stabilizing lenses for older
SLR cameras that don't have sensor stabilization. I
thought at first I might be reading one of those
zombie ideas from 2002 then I saw it was 2014. |
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@DIYMatt - OIS compensates for simple vibration, a gimbal mount compensates for major camera movement in 2 or 3 degrees of freedom. Watch some Youtube videos to see what a gimbal mount can give you - for example, NwEeqWqypuo - simple optical stabilization isn't in the same ballpark. |
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