I've seen cameras that do something like this.  When image stabilization is
turned on, what you see in the viewfinder "zooms in".  I.e. if you have a
10" field of view, then turn on stabilization, it jumps to a 9" field of
view.  The image you see is a small part of the real image, the
stabilization system just shifts the rectangle containing the recorded
image.  I don't know what systems are used.  I would think accelerometers
could be used.

John

-----Original Message-----
From: Stephen B Webb [mailto:sbwebb0@SAC.UKY.EDU]
Sent: Tuesday, October 17, 2000 12:52 PM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [ot]: How do camera stabilization systems work?


> I thought they used some type of gyro, and I was

Hmm.  I don't really know much about the cameras, but I didn't think that
they used gyros.

My understanding was that they had an "oversized" ccd, and only used a
(NTSC sized) subregion of the full ccd to form the image.  There are algs.
that have been developed to detect camera movement from sequences of
images...I figured they detected movement and corrected for it by moving
the image region around within the ccd space.

-Steve

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