Subject:
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Re: Line Following by Humans versus Bots
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 16 Nov 1999 04:08:05 GMT
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Viewed:
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530 times
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I wish I had time to post more on this right now, but suffice it to say
there has been a lot of research on how humans and animals do this type
of thing. Staying within a hallway without bumping into the walls is
actual done by taking a mental snapshot and comparing it to the next
"frame"- in that way, we determine the relative motion of each of the
areas we are looking at, and attempt to make those relative motions fit
our ideas of what we should see (i.e., they should both be moving the
same amount if we are going down the center of the hall, left wall should
be moving more if we are turning left, etc.)
The experiments that have done to "prove" this have been done mainly on
flies. By putting them in a "hallway" where one wall is actually moving
(scrolling, IIRC) they tend to turn towards or away from that wall, as
appropriate.
I can't find any URLs at the moment, but if you want to search for it,
the technical term for what we produce is a "flow field" because we are
determining how objects around us are "flowing." Look for that and see
what you can find.
-Luis
P.S. Oh yeah- do I even need to mention that I know about this
because it is the topic of extensive research, and is essentially
impossible to do without video cameras and complex algorithms? Not much
computation involved (a fly can do it, after all) but still complex.
On Tue, 16 Nov 1999, C S Soh wrote:
> I wonder if bots were made to follow parallel lines the way we humans
> do, would just 2 light sensors be necessary and sufficient for the
> purpose? And would the bot move smoothly without jerking to and fro like
> a druken driver?
>
> --
> C S Soh
>
> http://web.singnet.com.sg/~cssoh
> ... where air is power
>
>
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Message has 2 Replies:
 | | Re: Line Following by Humans versus Bots
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| (...) Fascinating, I tried the search but unfortunately nothing related turned up. Coincindentally, there's another thread on line following based on the conventional single black line. There is the suggestion that the line has to be somewhat (...) (25 years ago, 16-Nov-99, to lugnet.robotics)
| | | Re: Line Following by Humans versus Bots
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| (...) Although it's an "old" book now by scientific standards, Valentino Brateiberg's Vehicles (MIT press I believe, still in print) contains a clear and accessible discussion of this topic, plus reference to the standard literature. I suppose you (...) (25 years ago, 16-Nov-99, to lugnet.robotics)
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Message is in Reply To:
| | Line Following by Humans versus Bots
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| For some reason, bots are compelled to follow a single line. Whereas humans typically keep within two parallel lines when they drive. However, when they are inebriated, humans may try to emulate the bot, often with disastrous results. There exist (...) (25 years ago, 16-Nov-99, to lugnet.robotics)
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