Monday, March 10, 2008

[oopic] Re: New range finder needed

--- In oopic@yahoogroups.com, Brian Lloyd <brian-wb6rqn@...> wrote:
>
>
> On Mar 10, 2008, at 10:02 AM, Shaggy wrote:
>
> >
> > I think I'm merging two different ideas. A camera would work for
> > imaging the line, but if I was to use a camera, I'd not want to
be throwing away the rest of the information included in the image,
because there would be other things there that I could make use of.
>
> Certainly if you have the imager there you can use it to collect
> images. But it seems reasonable to use the imager just to map
objects.
>


For general mapping, this approach sounds lighty-ears more difficult
than, say, just using a servo to pan a sonar. Large battalions of
people have been working on computer vision for about 5 or 6
**decades** now, and they still haven't cracked it.

OTOH, in Joe Engelberger's 1989 book Robotics in Service, that I have
been reading lately, he does mention a simpler way to use a video
camera. Namely, you use a laser [could be a laser-diode pointer
today] to cast a single bright "line" onto an object, and then use
the camera to analyze the deflections as the line bends around
objects, etc.


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