I am now doing some research on Advanced Camera API. 

https://library.vuforia.com/articles/Solution/Advanced-Camera-API

I read and follow the steps from above site, and copy the script to the Vuforia sample unity project.

I can get the camera parameter when I run the app in Android device. However, when the app is run in Hololens or PC using web camera, there is no parameters return. 

May I know is the above API only supported by Android device only?

Thank you very much.