[ros-users] ROS Service Definition (common_msgs) for Camera Parameters (FPS, Whitebalance, etc).

Maxim Taschew maxim at taschew.de
Sun Oct 16 19:06:55 UTC 2011

Uhh wow. Obviously i couldn't  see the forest for the trees.

Sorry for that useless post.




Von: ros-users-bounces at code.ros.org [mailto:ros-users-bounces at code.ros.org]
Im Auftrag von Eric Perko
Gesendet: Sonntag, 16. Oktober 2011 20:43
An: User discussions
Betreff: Re: [ros-users] ROS Service Definition (common_msgs) for Camera
Parameters (FPS, Whitebalance, etc).


On Sun, Oct 16, 2011 at 2:20 PM, Maxim Taschew <maxim at taschew.de> wrote:

ROS Service Definition (common_msgs) for Camera Parameters
(FPS,Whitebalance, etc).

Hi ROS Users,

I'm currently working on a ros driver for a camera. 
I could use the listed common_msgs image, camera_info, setCameraInfo to
create my driver to some sort of - let's say standard ;). So far so good.

However last week I came across the issues of parameterizing my camera in
terms of FPS, Whitebalance, Gain, ROI and so on. Unfortunately there isn't
any suggestion about parameterizing made in the camera_driver part in ROS.

And this leads to my question:

Wouldn't it make sense to have a parameter service message for Cameras in
the common_msg stack? This could include values like fps, roi, encoding and
so on. This way the parameters of a camera could be set way more generic.
For example with a parameterizing node, this could be used for any camera
node that has this parameter service.

Of course every camera has different parameters which can be set or not.
This problem could be solved with a camera_parameter_info message. This
message may keep information about supported parameters for the device.  For
instance FPS (yes,no) and FPS min and max Values.

Here is a very "cheap" (sry, it's Sunday!!) picture to give visual support.



So what do you think about


Have you taken a look at how the existing drivers such as camera1394 use
dynamic_reconfigure? There was also discussion in the Fuerte Drivers SIG
about ways to extend dynamic_reconfigure that may be relevant. See the links
here: http://www.ros.org/wiki/fuerte/Planning/Drivers#Proposed_new_features


- Eric


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