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trackable image lost

Hello 

It's been a day  I'm struggling with this issue , I have a little neckless which I want to use AR for it , it's almost a flat one and when I take photo and upload it in target manager it gets 4 stars, but the problem is that unity can't detect it , I don't know if it is because of small size or the poor camera quality or what, then I decided to use a small barcode on back of it again the same problem occuerd , 4 stars but untrackable, is it because of changing lighting  condition or something similar ? 

thanks a lot for helping me 

Hello elshanazadi,

I've downloaded both of your targets and have been able to detect them within the Core Sample project. I don't have the necklace to test the target against the actual object, but I can confirm it works against the image.

I see that you have a Camera object as a child of your ARCamera, are you using Unity 5.6 with Vuforia 6.2? Or are you using Unity 2017.2 with the integrated 6.5?

Hello again,

Unity 2017.1 is not a supported version for Vuforia 6.2.10. Are you able to test this with Unity 5.6 instead? There are various compatibility issues with 2017.1 and Vuforia 6.2.10 that aren't present when using Unity 5.6.

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