[ros-users] Autofocus for Logitech QC Pro 9000

[Eric Perko]

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 at 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 at 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 at 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 at cs.tum.edu
> >> WWW: http://ias.cs.tum.edu/people/pangercic
> >> _______________________________________________
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> >> ros-users at 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 at cs.tum.edu
> WWW: http://ias.cs.tum.edu/people/pangercic
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