[ros-users] ar_pose orientation accuracy

Herman Bruyninckx Herman.Bruyninckx at mech.kuleuven.be
Mon Nov 8 14:00:10 UTC 2010

On Mon, 8 Nov 2010, Steven Bellens wrote:

> 2010/11/8 Steven Bellens <steven.bellens at mech.kuleuven.be>:
>> Hi,
>> I'm experimenting a bit with the ar_pose package. I'm using a single
>> fixed camera to track a moving marker. To verify the estimation
>> accuracy, I just leave the marker fixed and I've plotted position and
>> orientation estimates. The position estimates are pretty much
>> constant, but the orientation estimates are oscilating a lot (see
>> appendix), and apparently always between two values. Is this because
>> of the bad capability to estimate that orientation or can this be
>> caused by the environment conditions (light - set-up - distance to
>> marker)?
> For clarity, plotted are the 4 components of a unit quaternion.

So...? What does a jump of "0.1" quaternion units mean? And is this meaning
the same for each of the four components?

The answer to this last question is probably "no", hence...?


More information about the ros-users mailing list