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<DIV><FONT size=2 face=Arial>i love pocketable gadgets so would be sorely
tempted to nick any laser pointer "lent" to me. suspect others may do similar?
</FONT></DIV>
<DIV><FONT size=2 face=Arial>also i'm sure any daily mail undercover journos
present would make up a story about us planning to crash passenger jets by
collectively blinding the pilots. wot a cynic i am!</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
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style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=mike@mbharris.co.uk href="mailto:mike@mbharris.co.uk">Mike Harris</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=hacktionlab@lists.aktivix.org
href="mailto:hacktionlab@lists.aktivix.org">hacktionlab@lists.aktivix.org</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, May 30, 2013 2:58
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [HacktionLab] micro workshop
idea - interactive meetings using laser pointers</DIV>
<DIV><BR></DIV>On 30/05/2013 13:47, johnc wrote:<BR>><BR>> This type of
problem is known as blob detection. There are some good<BR>> free machine
vision libraries for doing this including opencv. There's<BR>> quite a lot
of samples included with these libraries. I played with<BR>> some
edge detection stuff in python a while ago and got it working<BR>> with a
web cam without too much hassle. Also Beth has some some recent<BR>>
experience with machine vision stuff in C so she might be able to give<BR>>
you some code to get you started.<BR>we could always all wave our hands about
to decide whether we agree on<BR>where the blobs are ... ;)<BR>><BR>>
P.S. hope those lasers are Class I so we don't blind anybody<BR>><BR>>
On 30/05/13 10:40, Andy S wrote:<BR>><BR>><BR>> > On 29 May 2013
17:42, Mick Fuzz <<A
href="mailto:mickfuzz@clearerchannel.org">mickfuzz@clearerchannel.org</A><BR>>
<<A
href="mailto:mickfuzz@clearerchannel.org">mailto:mickfuzz@clearerchannel.org</A>>>
wrote:<BR>><BR>> > On 29/05/13 17:25, Gareth Coleman wrote:<BR>>
> ><BR>> > > You could call out for a vote at specific times,
and it would take<BR>> > > just a few seconds for everyone to get
their spot on target and then<BR>> > > the results would be visible.
Each vote is equal, unlike our voices<BR>> > > which have a certain
'power' despite all our efforts to consciously<BR>> > > equalize
them.<BR>> > I love this idea! Let's do it.<BR>><BR>><BR>> >
_______________________________________________<BR>> > HacktionLab
mailing list<BR>> > <A
href="mailto:HacktionLab@lists.aktivix.org">HacktionLab@lists.aktivix.org</A>
<<A
href="mailto:HacktionLab@lists.aktivix.org">mailto:HacktionLab@lists.aktivix.org</A>><BR>>
> <A
href="https://lists.aktivix.org/mailman/listinfo/hacktionlab">https://lists.aktivix.org/mailman/listinfo/hacktionlab</A><BR>><BR>><BR>>
> B<BR>> > e interesting to see how you count the laser spots
especially when<BR>> they are spread evenly across the selection as they
will all be moving<BR>> quite a lot, unless people have very steady hands.
Obviously the more<BR>> people involved, the harder this gets, unless you
have an automated<BR>> process to count them (well lets face it, a photo
would do!)<BR>><BR>> > A<BR>><BR>><BR>> > --<BR>> >
*http://www.bristolwireless.net/** | **0117 325 0067 |<BR>>
**sip:info@bristolwireless.net <<A
href="mailto:sip%3Ainfo@bristolwireless.net">mailto:sip%3Ainfo@bristolwireless.net</A>>*<BR>>
> *Bristol Wireless**<BR>> > Windmill Hill City Farm<BR>> >
Philip Street<BR>> > Bedminster<BR>> > Bristol BS3
4EA*<BR>><BR>><BR>> >
_______________________________________________<BR>> > HacktionLab
mailing list<BR>> > <A
href="mailto:HacktionLab@lists.aktivix.org">HacktionLab@lists.aktivix.org</A><BR>>
> <A
href="https://lists.aktivix.org/mailman/listinfo/hacktionlab">https://lists.aktivix.org/mailman/listinfo/hacktionlab</A><BR>><BR>><BR>><BR>><BR>>
_______________________________________________<BR>> HacktionLab mailing
list<BR>> <A
href="mailto:HacktionLab@lists.aktivix.org">HacktionLab@lists.aktivix.org</A><BR>>
<A
href="https://lists.aktivix.org/mailman/listinfo/hacktionlab">https://lists.aktivix.org/mailman/listinfo/hacktionlab</A><BR><BR>--
<BR>Mike Harris<BR>w: <A
href="http://mbharris.co.uk">http://mbharris.co.uk</A><BR>t: +44 7811 671
893<BR>0: <A
href="http://mbharris.co.uk/keys/pgp.html">http://mbharris.co.uk/keys/pgp.html</A><BR><BR><BR>_______________________________________________<BR>HacktionLab
mailing list<BR><A
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