How much do you know barcode marked cards

How much do you know barcode marked cards? Barcode marked cards are different from back marked cards.
We make barcode marked cards with barcodes on the four edge sides of playing cards while marking back marked cards only on the backside of poker cards. The invisible markings on the different position of playing cards, and therefore, we need to use different kinds of marked cards reader to see its markings.
Last but not least, only playing card scanner can read barcode marked cards while infrared contact lenses cannot see through its invisible ink marks.