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I build an AR apk which when see Queen of Heart (of card) display a Barbarian.(It was just for fun & I don't know know why i choose a barbarian for Queen of heart..jk!!)

Here is image of the card-

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Card used as target image

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While toying with it I thought why not try to see if AR can be generated from the image of card in the mirror!!

In mirror left is right and right is left(appear to us) but as you can see that in card since down side is symmetric opposite of upper side

So in theory when the card is placed in front of mirror both sides shall appear to face opposite direction that of card.

Meaning that when Apk scan the card the mirror left/right reversal shall get cancelled/neutralize(i dunno what would be correct term here!!) by the symmetric image of card.So in theory one should see AR displayed with variation in the degree.

(The Apk is programmed to display the Barbarian(3D) at right angle upward wrt card)

But when displayed in mirror, the scanned image(from inside the mirror) there is NO display!!

I also tried to see if it work with card image being displayed in the smartphone screen & there is display!

Is there different kind of physics involved while display in smartphone screen & ordinary mirror?

because we can use screen display as ordinary mirror display.

To make project I used Vuforia and unity.

Does anyone know why this is happening?

If this is like rea problem maybe I can try to publish paper regarding this (lol)

On serious note if you think anything I am not aware of like some physics concept or how apk display work let me know)