By reviewing the tut tutorial, I can know the basic operations:
Test the sensitivity of the AR camera, test different model shapes and quantities, and the resolution of simple word cards or images.

The material of the sphere comes from tut's Martian astronauts, and I borrow a few to temporarily distinguish different objects.

The card patterns are temporary images from my gallery, chosen simply because they can be successfully uploaded to "vuforia". The playing cards are images that I use to detect 8-bit grayscale or RGB and PNG. , vuforia has very strict requirements on pictures.