Yaw and Roll affected by Pitch

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heath789
Posts: 41
Joined: Wed Aug 10, 2011 7:42 am

Yaw and Roll affected by Pitch

Post by heath789 » Tue Aug 16, 2011 11:36 am

I am trying to rotate the pitch independently of the yaw and roll, and when I do so, both yaw and roll flip back and forth near +/- 180 degrees when they should be stable around zero.

In fact, it looks like Yaw and Roll are mirror images of each other for much of the recording. The data is attached (pitch=red, roll=black, yaw=blue) and is from the exported csv in Tracking Tools.

I am using V 2.3.1 with 24 cameras, and the trackable is using an optitrack rigid body base.

Image: http://www.sendspace.com/file/1jov6g

NaturalPoint - Mike
Posts: 1896
Joined: Tue Feb 01, 2011 8:41 am
Location: Corvallis, OR

Re: Yaw and Roll affected by Pitch

Post by NaturalPoint - Mike » Tue Aug 16, 2011 12:11 pm

Would it be possible to send the calibration, timeline, and rigid body files so that we can look at them?

heath789
Posts: 41
Joined: Wed Aug 10, 2011 7:42 am

Re: Yaw and Roll affected by Pitch

Post by heath789 » Wed Aug 17, 2011 8:42 am

Please see the zip file containing the files. The calibration was done right before recording. I am, for the most part, rotating the trackable about the pitch direction only and sometimes the yaw and roll jump around erratically when adjusting the pitch only a few degrees.

http://www.sendspace.com/file/kp69i4

malkuth23
Posts: 1
Joined: Tue Apr 24, 2012 2:26 pm

Re: Yaw and Roll affected by Pitch

Post by malkuth23 » Sat Apr 28, 2012 10:31 pm

Is there a solution to this?

I believe I am having a similar problem.

NaturalPoint - Mike
Posts: 1896
Joined: Tue Feb 01, 2011 8:41 am
Location: Corvallis, OR

Re: Yaw and Roll affected by Pitch

Post by NaturalPoint - Mike » Mon Apr 30, 2012 12:51 pm

Often times it is actually reporting the information properly, though it appears unintuitive. A good check to ensure you're getting data properly would be to use the quaternion values to reconstruct the data and ensure it's appropriate. There should not be any discrepancy.

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