Re: [ros-users] Autofocus for Logitech QC Pro 9000

Hi Dejan,

Not sure. We've not seen that before and it seems pretty weird that it would
be segfaulting in the creation of the OpenCV header unless config_.width or
config_.height are wrong.

What version of opencv is that building against? And what are the values for
config_.height and config_.width that are causing it to fail? I'm assuming
you can get those from gdb when it crashes?

- Eric

On Mon, Aug 30, 2010 at 1:43 PM, Dejan Pangercic
<dejan.pangercic@gmail.com>wrote:

> Hi Eric,
>
> as always a really great hint and it would've worked out perfectly but
> I could not get the camera to run using the forked version of the
> driver (github.com/ericperko/uvc_cam).
> It segfaults in the line 178 of the uvc_cam/src/uvc_cam_node.cpp file
> while creating the image header:
> IplImage *imageIpl =
> cvCreateImageHeader(cvSize(config_.width,config_.height), 8, 3);
>
> See also my backtrace:
> http://pastie.org/1127043
>
> Any idea why this might happen?
>
> cheers,D.
>
> On Mon, Aug 30, 2010 at 10:27 AM, Eric Perko <wisesage5001@gmail.com>
> wrote:
> > Dejan,
> > Did you take a look at the uvc_cam driver
> > (http://www.ros.org/browse/details.php?name=uvc_cam)? I don't remember
> if it
> > or the fork my group was doing some work on (
> github.com/ericperko/uvc_cam)
> > supports autofocus at the moment, but I do recall that adding features to
> > the dynamic reconfigure settings was pretty easy if it works in guvcview.
> > Since both use the same uvc driver interface, code that works in guvcview
> > should be easily portable to the uvc_cam driver. I've CC'd my
> collaborator
> > that has been using it regularly for a while and did most of the driver
> side
> > stuff, so he may be able to give some more info if I'm totally wrong in
> any
> > of this (It has been a while since I did any serious work on the driver).
> > I'm pretty sure that, at the very least, if you save your settings with
> > guvcview and then do not change them with a uvc based camera driver on
> > startup, the cameras should maintain the settings from guvcview.
> > Also, I hadn't noticed that there are more options when guvcview is run
> as
> > root vs. a regular user. We've been having some issues with parameters
> > acting weirdly on some cheap webcams that we have and perhaps running as
> > root may expose some more parameters that might allow us to solve the
> > weirdness. Luckily, better cameras such as the Logitech Webcam Pro 9000
> > haven't given us any trouble so far.
> > I can't really say for how easy it would be to add that feature to the
> other
> > drivers compared to adding it to a uvc based driver. If you do hack on
> this
> > based on our fork, patches are welcome :)
> > - Eric
> > On Mon, Aug 30, 2010 at 3:55 AM, Dejan Pangercic <
> dejan.pangercic@gmail.com>
> > wrote:
> >>
> >> Dear ROS-istas,
> >>
> >> I got a Logitech QC Pro 9000 camera which came with an autofocus
> >> property and which I can set in e.g. guvcview (though only as su
> >> user). It is set to false by default and it would be nice to be able
> >> to enable it within any of the ROS drivers. I did not find this
> >> feature in any of the existing drivers I tried out (gscam,
> >> logitech_web_cam, logitech_usb_webcam, usb_cam).
> >> Said that, does anyone know which driver would be the simplest to
> >> bring this feature in?
> >>
> >> thx and cheers, D.
> >> --
> >> MSc. Dejan Pangercic
> >> PhD Student/Researcher
> >> Intelligent Autonomous Systems Group
> >> Technische Universität München
> >> Telephone: +49 (89) 289-26908
> >> E-Mail: dejan.pangercic@cs.tum.edu
> >> WWW: http://ias.cs.tum.edu/people/pangercic
> >> _______________________________________________
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> >> ros-users@code.ros.org
> >> https://code.ros.org/mailman/listinfo/ros-users
> >
> >
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>
>
>
> --
> MSc. Dejan Pangercic
> PhD Student/Researcher
> Intelligent Autonomous Systems Group
> Technische Universität München
> Telephone: +49 (89) 289-26908
> E-Mail: dejan.pangercic@cs.tum.edu
> WWW: http://ias.cs.tum.edu/people/pangercic
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