Hello,

The star rating provides a heuristic analysis of the given target, but does not necessarily represent the actual run time detection and/or tracking performance. It is to provide some level of feedback to help guide developers to optimize their targets.

Here is some guidance on optimizing targets: https://library.vuforia.com/articles/Solution/Optimizing-Target-Detection-and-Tracking-Stability

Some additional tips:

1. Always print the image that was uploaded to the portal to the exact same aspect ratio. Any stretching or altering of the image may cause tracking pose jitter. Some printers default to "stretch to fit", which can change the aspect ratio.
2. Check the size values you are using when uploading Targets to the Vuforia Target Manager. Note there is specific language used in the dialogue box that says Vuforia uses meters as the default unit scale. Incorrect target sizes could affect either our detection/tracking algorithm
3. Image Targets must be flat when in the camera's field of view
4. Not enough lighting upon, and/or spectral reflections occluding the Image Target

Thanks,

Vuforia Engine Support

Hello,

Thanks for the reply, it would be great if you could answer the below queries,

1. Could you be more detail on the below point, also let me know what is the recommended value for the Size Value

"Check the size values you are using when uploading Targets to the Vuforia Target Manager. Note there is specific language used in the dialogue box that says Vuforia uses meters as the default unit scale. Incorrect target sizes could affect either our detection/tracking algorithm".

2. We are printing the target in oil printing sheets which is used for the Brochure, we felt the scanning fails frequently. What we should do to get perfect scanning and loading of content on the exact target.

3. spectral reflections - to avoid this what we should do.