[oats-sig] Re: open gazer

Hi

Thanks Stephen. I'm finishing of a Gutsy install so will try it out
there in the next few days or so with a cheap-o Creative web cam.

Steve

On 03/10/2007, stephen emslie <stephenemslie at gmail.com> wrote:
> 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!
> >
>
>

-- 
Steve Lee
--
Open Source Assistive Technology Software
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