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Position update during tracking

April 30, 2020 - 3:56am #3

Hello There,

 

We developed an object tracking application under Vuforia 7.1 and Hololens. This application works well when user holding a specific object or image and move them around. Virtual target will follow such movement immediately. But after migrated the application to Hololens2 (Vuforia 9.0.12), there is significant latency between the movement of real object or image and the movement of virtual object. The latency is more severe when object is rotating or tilting.

Our application is aimed for medical device tracking, such movement mismatch may result unintended misusage. We would appreciate any instruction or suggestions on how to improve this performance. 

Best Regards

JDSunFei
Joined:
June 15, 2018
Posts: 2
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Position update during tracking

May 4, 2020 - 3:50am #2

Hi,

It may happen that you are encountering this bug:  Targets with motion hint STATIC are more sensitive to wrongly specified physical size in the dataset mentioned in https://library.vuforia.com/articles/Release_Notes/Vuforia-SDK-Release-Notes

However if you are moving the object, you should check if the Motion Hint is set to Adaptive. (Option available under the Model Target Behaviour script) If not, set it to Adaptive.

Thank you.

Vuforia Engine Support

mcotora
Joined:
March 15, 2019
Posts: 1391
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Position update during tracking

May 11, 2020 - 8:09pm #1

Hi there,

Thank you for the speedy suggestion. Unfortunately, it does not solve our problem.

We are using Object Target as the tracking model, which does not have the "Motion Hint" property. This object target achieved 0.5mm~2mm 3D spacial tracking accuracy by Hololens 1 camera in different senario and was very robust under Vuforia 7.1.

Really appreciate if there is a solution to help us continue this project in Hololens 2 platform.

Best Regards

JDSunFei
Joined:
June 15, 2018
Posts: 2
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