topic AMT loosing track when object is flipped in Vuforia Studio

AMT loosing track when object is flipped

Aditya1702 — Fri, 28 Feb 2025 08:49:09 GMT

Hi Everyone,

I am using Advance Model Target in Vuforia Studio but whenever I flipped the object it looses its tracking and the orientation of digital & physical model gets disturbed.

Has anyone experience the same scenario & can anyone explain me why AMT behaves in this manner.

Note: I have set a small area as an AMT since the model is large.

Thanks & Best Regards,

Aditya Gupta

Re: AMT loosing track when object is flipped

RolandRaytchev — Wed, 05 Mar 2025 10:18:49 GMT

Hello @Aditya1702 ,

regarding your question for me is not clear what " I flipped the object " in your application case means. So I belive some change of the real object e.g. rotation , movement etc.- or is that the attempt to have view from different angle or position to the object . when there is a picture or video possibly that could help. I believe that AMT will have no issue so far the movement or rotation is small and smooth - so far I think it will work but , I believe that when we have change like a flipp that we can expect that the tracking will be lost and possible new alignment of the AMT is required

I think also your note saying "small area as AMT since model is large" - I believe here the geometry is meant- so that AMT is only a small area/volume part of a large model. That possible is not a good approach but possibly you could provide more details about that constellation.

- here , I think, the important point is how to separate the model used as AMT :

mean that AMT is an extra modelWidget which refer only to the model what should be scanned
we have clear defined separation between the AMT model and the other 3D geometry /which is not part of the target /means clear boundaries between these area

Re: AMT loosing track when object is flipped

Aditya1702 — Wed, 05 Mar 2025 10:42:31 GMT

Hi @RolandRaytchev ,

Yes, by flipping I meant rotation of the object (180 degree rotation)

Also can you suggest me how to make best use of AMT when the physical model is a large geometry, or Do I need to give the whole geometry as AMT.

Thank you for your response.

Regards,

Aditya Gupta

Re: AMT loosing track when object is flipped

RolandRaytchev — Wed, 05 Mar 2025 18:00:51 GMT

possibly you can try to use a simple and small model as AMT to test and try the same action there to see if the behaviour is reproducible. If yes that means that probably follow the current functionality. If only reproducible with your model constelation then the specific target need to be checked more detailed
for the best practices for Modeltargets generation and usage I could refer to the Vuforia Development side

https://developer.vuforia.com/library/vuforia-engine/images-and-objects/model-targets/best-practices/model-targets-supported-objects-cad-model-best-practices/

https://developer.vuforia.com/library/vuforia-engine/images-and-objects/model-targets/advanced-model-targets/advanced-model-target-databases/

and

https://developer.vuforia.com/library/vuforia-engine/images-and-objects/model-targets/using-3d-scans/comparison-object-tracking-methods/?h=model+target

the link above there are general tips for usage but in particular cases depending on the gemerty we could be faced with different challenges specific for the particular model /means level of details, size etc