Never mind, with the benefit if sleep I see an error in my math. Still, I wonder if a similar thing could be done by shuffling a deck of cards, and then riffli

Never mind, with the benefit if sleep I see an error in my math. Still, I wonder if a similar thing could be done by shuffling a deck of cards, and then riffling the results past a good camera so that an app can recognize the sequence in order. Perhaps it would be vulnerable to common shuffling mistakes?