The rating is meant as a guideline.

If you look at the image in general there are not too many clearly distinguishing areas - read the links I posted earlier.

It is worth you running some tests with various images to see what happens.

N

I don't know, this question is correct or not. If the target is not best target means, then why should cloud database augmentable displays with 4 star?

It's probably not the best target, and the reflections probably will not help

Check these guides

https://developer.vuforia.com/resources/dev-guide/image-targets

https://developer.vuforia.com/resources/dev-guide/natural-features-and-rating

https://developer.vuforia.com/resources/dev-guide/image-target-enhancement-tricks

N

I tried with mobile device object. I took picture of mobile device and store that image to vuforia.  When i point to mobile device it loading request label and it will take time to track. But my image is having 4 star in database. When i was taking picture of mobile i kept the mobile in some table. Later, if i track the device it detecting only on the table background. If i change the device on some other place it won't tracking. Is it depend on background table? See my image

Hard to say as each case is different, and it depends on the target.

Why don't you make a test?

N