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360 Model Targets Guide View Issue

July 8, 2019 - 12:48pm #1

Does the orientation have any kind of consideration when tracking an object?  I have mixed results so I'm not sure if the effort I'm taking when creating the guide view is worth it.  In the screen shots I'm including you can see the guide view I used to create the database for 360 recognition.  I have an object positioned with its most probable orientation when generating the model target.  As you can see in the screen shot the grid is above the object meaning it has been flipped upside down in the generator.

When I try to identify the object in Unity the expected orientation yields no sort of positive recognition.  However, when I flip the object over the object is rather quickly identified.  Does this mean I need to orient the object outside of MTG and the 360 Guide View doesn't really have any kind of impact?  Is it a little bit of both?  Am I missing something entirely?  Also, when we are trying to track something along 360 degrees, is that limited to the objects Up vector?  If we change the Up vector in the model attributes will that have an impact on the objects tracked vector or is it limited to how the object will rotate in the Guide view?

 

Thanks,

-- Abstract

Model Target Generator Guide View

unable to identify with expected orientation

tracking with a flipped orientation

360 Model Targets Guide View Issue

July 15, 2019 - 4:29pm #3

Hello,

There does look to be an issue with the up vector of your 3D model, which has been propagated into the Model Target Generator. I'd also check you size units as they are in meters and your picture does not show a 3D printed model of that size. Correct scale of the model is important for detection and tracking. Confirm that the scale of your CAD model is an accurate representation of your physical model.

We just recently commercialized Advanced Model Targets 360, which does what I believe your trying to achieve without having to define a guide view:

https://library.vuforia.com/content/vuforia-library/en/articles/Solution/Getting-started-with-advanced-model-targets-360.html

Have you considered using this feature to simplify your workflow? I still have a concern about the up vector of your 3D model not being correct and thus you may still suffer from similar detection issues.

Thanks,

Vuforia Engine Support

360 Model Targets Guide View Issue

July 10, 2019 - 7:47am #2

Another image to help shine some light on the situation.  I set the Guide View how I expected the object to be oriented but when you look at the Target Recognition Range the object is back to it's default orientation with no means to re-orient the object.  I suppose that means we currently need to orient the object in something like Blender and then bring it in to Vuforia.  Hopefully, we can get some kind of update in the future that will either adapt the orientation established in creating the Guide View or allow for us to rotate the object when editing the Target Recognition Range.

Thanks,

Abstract

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