Problem with coordinate system

Hi, i want to calculate distance betwenn two qrcode. But unity uses a left-handed coordinate system while the Windows Perception APIs use right-handed coordinate systems.

So when i rotate my qr code on a general axes Z. The distance becomes wrong on X and Y varie. 

Microsoft give us that 

https://docs.microsoft.com/fr-fr/windows/mixed-reality/develop/platform-capabilities-and-apis/scene-understanding-sdk

but we have not explanation of how to apply this code...

Do you have any solution ?