Log in or register to post comments

Tracking Interuption

November 19, 2018 - 11:29am #1


We are having issues with ground plane tracking in our app whereby when someone walks through the object whilst it is being tracked, the object attaches to that person and then follows them. 

How do we stop this happening?


Tracking Interuption

November 20, 2018 - 1:20pm #2


I'm not aware of any proactive steps or settings that can alleviate this type of issue. It has been infrequently observed in our testing, but never appeared to me to be a significant issue or regression.

Can you share a few additional details:

  • Vuforia Engine SDK version?
  • Unity Editor version (if applicable)?
  • Device model?
  • Picture of your environment, or a video demonstrating the issue

Due to the nature of the technology, Ground Plane may not be able to provide 6DoF tracking in all environments. This article includes some information for an ideal Ground Plane environment: https://library.vuforia.com/articles/Training/ground-plane-guide.html

Specifically, the following is relevant to this issue: Ground Plane utilizes images from the device camera to understand the basic geometry of your environment. Therefore it is necessary to stage Ground Plane experiences in settings that enable the camera to accurately capture the details of the surroundings. 


  • Stable lighting conditions
  • Moderate lighting - not too bright or too dark
  • Avoid glare and dark shadows
  • Surface details help to reveal geometry and improve accuracy and performance

Doing our own experiments, we've found that in areas with low detail surfaces we were able to improve the experience by taking additional time to scan the environment before performing the first hit test. While not guaranteed to work, we were able to perform 6DoF/positional tracking in a wide variety of environments such as low detail carpet, tiles, and pavement.


Vuforia Engine Support

Log in or register to post comments