It depends on how you define them. The skeleton visualized with the kinect (
http://www.ros.org/wiki/openni_tracker?action=AttachFile&do=get&target=nite.png)
isn't a tree, although it could be converted to be one, I suppose

On Sat, Mar 26, 2011 at 1:11 PM, Patrick Goebel <patrick@pirobot.org> wrote:

>  Hi David,
>
> I agree it would be nice to have a standardized Skeleton message.  If all
> skeleton's are trees (is this true?) then perhaps an existing tree message
> type could be used if it exists.  KDL has kinematic chains and tf is already
> built around trees (right?).  That's about as far as I've thought it
> through...
>
> --patrick
>
>
> On 03/22/2011 04:17 PM, David Lu!! wrote:
>
> Hey Ros-users-
>
>  Has there been any talk of creating a standardized Skeleton message?
> Right now, it seems like the openni_tracker package just publishes
> transforms. It seems like if the Kinect does skeleton tracking, there should
> be a skeleton message.
>
>  I know pi_tracker has its own Skeleton message, which looks like it might
> fit the bill, although I don't think it defines which parts are connected
> (hip bone is connected to the thigh bone).
>  http://www.ros.org/doc/api/pi_tracker/html/msg/Skeleton.html
>
>  It might be good to have for not only the Kinect, but for other motion
> capture rigs (Vicon and the like).
>
>  Are there any other similar message out there?
>
>  -David!!
>
>
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