[ros-users] Autofocus for Logitech QC Pro 9000

[Eric Perko]

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
> _______________________________________________
> ros-users mailing list
> ros-users at code.ros.org
> https://code.ros.org/mailman/listinfo/ros-users
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ros.org/pipermail/ros-users/attachments/20100830/35e538cb/attachment-0003.html>