Check Digital Panel Value deference

I am not good at English. sorry.

If A is displayed in the digital panel , a certain picture , you want to display a different picture if B is displayed　by　AR.

However , if you take a picture of a digital panel with a photograph ,

probably because the screen is reflective ,

it does not go well.

Specifically , the image on the Developer Portal, but I was registered in the single image, is the value of the Rating is small .

It can actually recognize , but it takes considerable time before the camera to recognize .

If you include the background around the image , easily recognizable but I , in this case , even if the value of the Digital Panel has changed , we will continue to see the AR .

Could you tell me if there is something good advice .

Thank you .