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Vuforia tracking unstable

November 30, 2016 - 7:57am #1
Topic solved

Hi

acording to documentation Vuforia should shut down itself after a marker was recognized. THis is from the doc.

  1. Vuforia’s target Tracker recognizes the target
  2.     Target tracking is then initialized
  3.     The position and rotation of the target are analyzed to provide a robust pose estimate for HoloLens to use
  4.     Vuforia transforms the target's pose into the HoloLens spatial mapping coordinate space
  5.     HoloLens takes over tracking and the Vuforia tracker is deactivated

I could verify this by printing out a log message in the OnTrackingFound() callback. Vuforia stays disabled as long as i dont move my head too much.

Unfortunately it re-enables itself when the head movement is large, producing new OnTrackingFound() events and adjusting the position of the object producing jumps. Only if the marker image is removes fast enough Hololens takes completely over and provides smooth tacking. 

https://drive.google.com/open?id=0B8IelTNR8ZZ3X3JZMVk0WVNMY1U

Do you see the same behaviour? Why does Vuforia re-enable itself if the marker is not moving.

Ideally i would disable an imagebehaviour tracking completely after the first time a marker was found.

Thanks

Dimi

Vuforia tracking unstable

October 25, 2017 - 9:54am #4

Confirmed. Marker size as mentioned in the link is the issue. Make it the same size and your print will solve it.

Vuforia tracking unstable

December 13, 2016 - 1:44am #3

Hi

yes sorry the video was not open. ITs available now.

But the solution is outlined here. It has to do with the marker size.

https://developer.vuforia.com/forum/hololens/sample-has-no-stable-tracking

 

The video shows what happens if you print out a marker with a different size than specified in the ImageTarget.

it seems Digital stereo eyeware vuforia is really sensitive about this.

Vuforia tracking unstable

December 1, 2016 - 5:18pm #2

Hello,

Is Extended Tracking enabled? Without that enabled Vuforia will try to update the pose for every frame.

BTW not sure what you posted but I could not access it.

Thanks

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