For gamble tricks, if you don't want to wear the infrared contact lenses to see the luminous marked cards, you can consider the machine-readable code scanner to read bar code marked cards that the invisible ink readers can detect. Blackberry phone is a good cover for the barcode marked cards reader camera.
The scanning scanner has nothing to do with the original camera of the smart phone. It is built up in a special secret place and no one will notice it or can see it. The phone has been processed to adapt the scanning of the playing cards scanner and it can still use as a normal smart phone to call, to send message and so on. This phone is an ideal cover for marked cards camera if you can put the it on the poker table.