[HacktionLab] micro workshop idea - interactive meetings using laser pointers

[johnc]

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This type of problem is known as blob detection. There are some good
free machine vision libraries for doing this including opencv. There's
quite a lot of samples included with these libraries.  I played with
some edge detection stuff in python a while ago and got it working with
a web cam without too much hassle. Also Beth has some some recent
experience with machine vision stuff in C so she might be able to give
you some code to get you started.

P.S. hope those lasers are Class I so we don't blind anybody

On 30/05/13 10:40, Andy S wrote:
>
>
> On 29 May 2013 17:42, Mick Fuzz <mickfuzz at clearerchannel.org
<mailto:mickfuzz at clearerchannel.org>> wrote:
>
> On 29/05/13 17:25, Gareth Coleman wrote:
> >
> > You could call out for a vote at specific times, and it would take
> > just a few seconds for everyone to get their spot on target and then
> > the results would be visible. Each vote is equal, unlike our voices
> > which have a certain 'power' despite all our efforts to consciously
> > equalize them.
> I love this idea! Let's do it.
>
>
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>
> B
> e interesting to see how you count the laser spots especially when they
are spread evenly across the selection as they will all be moving quite
a lot, unless people have very steady hands. Obviously the more people
involved, the harder this gets, unless you have an automated process to
count them (well lets face it, a photo would do!)
>
> A
>
>
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