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model target recognition does not show model on play

August 8, 2019 - 1:30am #1



i'm doing some tests with your really awesome Model Target system on my gameboy



I uploaded the scan and set up the model under the ModelTarget object


but when i press play


and detects the target, nothing shows up unless i manually move the model from where it spawns (under the camera) back under the  ModelTarget where it was set originally


i attached a short video that demonstrates the issue


basically i have nothing in the scene but the AR camera, model target with the dataset and the model itself under the ModelTarget


extended tracdking is enabled OVR Manager is set to Quest.

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model target recognition does not show model on play

August 12, 2019 - 8:46am #4


Model Targets tracking requires devices that support Vuforia Fusion in order to perform optimally: https://library.vuforia.com/content/vuforia-library/en/articles/Training/vuforia-fusion-article.html

A web cam *does not* qualify as a Model Targets supported device as it does not include integrated sensors, such as an accelerometer and gyroscope. Without these, and depending upon your object, tracking quality will vary.

The video you originally provided showed Model Targets loss of tracking when you moved the web camera - this is a symptom of a device that does not support Vuforia Fusion.

Are you observing similar issues when running on the Galaxy S7? Unfortunately, Vuforia Engine *does not* support ARCore on that device: https://library.vuforia.com/articles/Solution/vuforia-fusion-supported-devices.html. I suggest you perform Model Targets testing on a device that supports either ARKit or ARCore as these will provide the best possible tracking experience:




Vuforia Engine Support

model target recognition does not show model on play

August 11, 2019 - 6:12am #3

hi medabit and thank you for the reply

something is not clear to me


is the extended tracking making the object not show? the issue (without ET) should only occur when i get tracking and then loose it.

I still don't understand why did the augmented object not show when i tracked it and i had to move it manually from parent to parent in order to make it show.


Also extended tracking is enabled.

min API level is set to 24 and the project was built on Samsung galaxy S7 that supports arcore (and have it installed)



in the build, the same problem (augmented object not shown upon detection) still persists.



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model target recognition does not show model on play

August 8, 2019 - 8:22am #2


Tracking is lost when you move the camera away from the object because Extended Tracking is not functioning - this is expected. In order for Model Targets to use Extended Tracking, which continues tracking when the target is not in the camera's field of view, you need a couple of things:

  1. Enable the Positional Device Tracker: Editor->Window->Vuforia Configuration->Device Tracker->Track Device Pose (checked)
  2. Be running on a device that supports ARKit, ARCore or Vuforia VISLAM

Since you're running on a web cam, Vuforia Fusion *will not* properly function as Extended Tracking is not supported in Play Mode. This is specifically because web cams do not have integrated IMUs, and thus cannot support #2 above.


Vuforia Engine Support

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