[oats-sig] Re: open gazer

OK will have a go! Though it'll be next week before I get a chance

I missed Stephen's detailed message, did it get moderated?
I'll try with my built in web cam.

S

On 04/10/2007, Simon Judge <simon.judge at nhs.net> wrote:
> OK will have a go! Though it'll be next week before I get a chance
> (complicated housing logistics of my life!).
>
> Cheers.
>
> Simon
>
> -----Original Message-----
> From: oats-sig-bounces at lists.becta.org.uk
> [mailto:oats-sig-bounces at lists.becta.org.uk] On Behalf Of stephen emslie
> Sent: Wednesday, October 03, 2007 11:31 PM
> To: OATs Project Special Interest Group
> Subject: Re: [oats-sig] Re: open gazer
>
> Hi
>
> It turns out the opengazer readme has been updated with answers to most of
> the questions that I encountered, so rather than repeat what has been
> written there I'll just point you on to the homepage [1] and the readme [2]
>
> [1] http://www.inference.phy.cam.ac.uk/opengazer/
> [2] http://www.inference.phy.cam.ac.uk/opengazer/README
>
> I can confirm that the apt-get installation of libcv-dev and all that does
> work on ubuntu.
>
> I found installing vxl a bit tricky as I am not familiar with cmake, but the
> vxl page does a good job of expaining it:
> http://vxl.sourceforge.net/releases/install-release.html
>
> Just make sure to set BUILD_SHARED_LIBS to ON. I also changed
> CMAKE_INSTALL_PREFIX on my system to /usr as I think it was /usr/local which
> ubuntu doesn't include in its search for shared libraries.
>
> also, I had trouble with the latest release, so perhaps use vxl-1.8.0 till
> you have things working.
>
> I also found the Makefile quite fiddly in opengazer 0.1.1, but that seems to
> have been improved in 1.1.2. The only thing I had to do was change the
> VXLDIR to reflect that '/usr' prefix on my system (it is set to /opt by
> default).
>
> The rest is described well in the makefile. I imagine there will probably be
> some hackery about the webcam. I found that I definitely needed the
>
> "sudo modprobe pwc size=vga"
>
> line before anything would work for me. One more catch I'm afraid.
> Ubuntu 2.6.20-16 seems to have removed the pwc driver, rather unhelpfully
> (it wouldn't even build under ubuntu!). If you're using a camera that
> requires this driver than roll back to 2.6.20-15 like me.
> I think the next webcam I buy will have to be supported by UVC or SPCA5XX or
> something else that actually works in ubuntu. I'll have to investigate the
> driver issue more thoroughly.
>
> I hope that helps a bit. Please respond with any problems you have and
> perhaps we can figure them out. Personally, I'm learning a lot of this as I
> go along so I welcome any feedback from more experienced linux hackers.
>
> Good luck!
>
> Stephen
>
> On 10/3/07, stephen emslie <stephenemslie at gmail.com> wrote:
> > Hi Tom
> >
> > Thanks for the offer of help on Windows. I'm sure that platform will
> > be a barrel of fun, so probably the first thing to investigate is
> > whether we can get opengazer built and running. I _think_ that most of
> > the dependencies can be built on windows, but perhaps we should see
> > what the author has to say.
> >
> > Stephen Emslie
> >
> > On 10/2/07, Tom Nabarro <whizz2000 at hotmail.com> wrote:
> > >
> > >  511"
> > > The next step is to start interpreting the calculated gaze positions
> > > into a switch activation. opengazer outputs everything to a port as
> > > it works, which should make things a bit easier. Any suggestions on
> > > good assistive software I can play around with? I hear there's this
> > > great "Jambu" thing... :)
> > >
> > > "
> > >
> > > in response to this from Stephen, if you need anything done on
> > > Windows I could write a socket application to listen for that port and
> then interpret
> > > the gaze positions     to detect for switch activationbased on the
> threshold
> > > method at first.  I might have the wrong end of the stick, but if
> > > any of this sounds useful let me know.
> > >
> > > ________________________________
> > > Get free emoticon packs and customisation from Windows Live. Pimp My
> Live!
> >
>
>
>
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-- 
Steve Lee
--
Open Source Assistive Technology Software
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