Subject:
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Re: Extra RAM
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 22 Jun 2000 18:28:47 GMT
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Original-From:
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John Barnes <barnes@sensors.com=spamless=>
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Viewed:
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504 times
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I feel compelled to add that using a bit map greatly simplifies the
code involved in handling a map. And it allows mapped features to
be classified easily too. Each byte, in a 2D "map" array represents a
patch in the real world (a paxel? or loxel perhaps) and it can take on
different values depending on whether a location is uninvestigated,
known and off limits, known and within limits, contains a moveable
object etc etc. It is quite hard to represent this richness using
vectors. But as has been noted before, the RCX's 32k makes it a very
tight fit for these types of applications.
JB
Is the world ready for the superbrick I wonder?
> Andy Gombos wrote:
> >
> > I was just thinking that with more room, you could have full-fledged
> > versions of software, and with limited firmware, you could have super huge
> > arrays that could be used to store data in very high resolutions(like a
> > map for navigation).
> > Andy
> How much resolution do you want to have and what for? If i think of an
> high resolution map, I think of vectors not bit maps. Esp. in a high
> resolution environment, you are much better and faster with vectors than
> with bit maps.
>
> If you imaging a integer (16 Bit signed) vector map with a resolution of
> 1 mm, you can describe a rectangular area of 65 by 65 meters. I thing
> this is enough for most LegoRobots. With souch an aproach i've described
> the outlines of my flat in under 2K of data.
>
> Regards Carsten
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Message has 1 Reply:
 | | Re: Extra RAM
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| (...) This really depends on the model you use. If you think of a simple vector map, which only encodes spatial data, you are right. But think of an model, which is divided into to major parts: spatial data and object data. The spatial data (...) (24 years ago, 22-Jun-00, to lugnet.robotics)
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