[757labs] Augmented Reality Indoors?
snelson at webapper.com
Tue Sep 13 09:59:49 EDT 2011
I'm certain you're right, but there may be tricks to work around that. We
could track a moving average of the signals which should smooth out any
spikes. In other words, record the signal strength every second of every
router. Then take the last 15 different values of each router and average
the strengths. That's probably an overly simplistic solution.
On Tue, Sep 13, 2011 at 9:36 AM, Nathan McGuirt <nathan at meltphace.org>wrote:
> I don't think that wifi signal strength is going to be a function of your
> distance from that access point, they don't radiate RF evenly in all
> directions and there are many obstructions to deal with that would cause
> wild swings in that signal strength.
> On Tuesday, September 13, 2011 at 8:20 AM, Steve Nelson wrote:
> > We have quite a few wifi routers in the back of the lab. I'm not certain
> how many, but could there be a way to put them in various parts of the lab
> and somehow measure the signal strength to each one? We could turn
> broadcasting off, so no one would see them.
> > If we had a iphone/android app that essentially had a map of where the
> hidden routers were physically located, maybe it could triangulate the
> position from that? Then we could simply override the html5
> getCurrentPosition method setting more accurate lat/lng.
> > I found an instructable on triangulating a complex shape. That part seems
> simple enough.
> > By doing that, google maps would work just like normal, they'd just be
> more detailed.
> > For example, GPS might report your position as:
> > lat: 36.852797
> > lng: -76.291656
> > Then when you walk in the door, the triangulation would take over and add
> another decimal place, like this:
> > lat: 36.8527975
> > lng: -76.2916569
> > Then we zoom in another level on gmaps, add our own blueprint and voila
> it works! It's still that triangulation that I don't know how to do.
> > Steve
> > On Mon, Sep 12, 2011 at 7:49 PM, Steve Nelson <snelson at webapper.com(mailto:
> snelson at webapper.com)> wrote:
> > > Just for shits and giggles I'm messing around with making a KML
> version of the lab using Google Sketchup. My rather silly idea is to port
> the KML over to a Google maps application where you could zoom in beyond the
> satellite images and be presented with a floor plan of the lab. Then add
> markers and areas assigned to various projects. I've done quite a few gmaps
> projects in the past. I think that much will work.
> > >
> > > So here's the million dollar question for the hardware geeks in the
> club. Could we rig up a series of fixed indoor radio signals that could
> triangulate your position down to within a few centimeters when you're in
> the lab?
> > >
> > > If we could, then we could create an augmented reality indoors. You
> could point a phone (or some Frankenstein Arduino device) at a table and it
> would tell you what project is being worked on there.
> > >
> > > Steve
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