The CMUcam can be set up to track a colour ( such as the colour of the laser
dot ).
You know where the cmu is located ..
You know where the laser is located ( pointing straight forward )
You now know where the laser dot appears on the cameras imaging.
Triangulation gives you the distance to the target.
And , yes, there are many situations where it falls down .... But that is
where the
fun comes in to write the programs to analyse data :)
You can start scanning, but then you add in a lot more variables and start
to slow
things down as far as the robot is concerned.
Need to decide on what resolution you are happy with .... Something I was
told
a long time ago ( well, ish ... mid 80's ) was start with the specifications
you need
THEN turn to design ... Even now I am guilty of doing it the other way round
in my hobby :)
----- Original Message -----
From: "dan michaels" <oric_dan@yahoo.com>
To: <oopic@yahoogroups.com>
Sent: Monday, March 10, 2008 5:48 PM
Subject: [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.
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/oopic/
<*> Your email settings:
Individual Email | Traditional
<*> To change settings online go to:
http://groups.yahoo.com/group/oopic/join
(Yahoo! ID required)
<*> To change settings via email:
mailto:oopic-digest@yahoogroups.com
mailto:oopic-fullfeatured@yahoogroups.com
<*> To unsubscribe from this group, send an email to:
oopic-unsubscribe@yahoogroups.com
<*> Your use of Yahoo! Groups is subject to:
No comments:
Post a Comment