[ros-users] Autofocus for Logitech QC Pro 9000

[Dejan Pangercic]

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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>
>
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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