I've been doing some work in this space (eticketing) and it's not as easy as you think. OK, 95% of the time it works, but that's not good enough and when you mo

I've been doing some work in this space (eticketing) and it's not as easy as you think. OK, 95% of the time it works, but that's not good enough and when you move into the "real world" - cracked screens, smudges, glare, dirty sensors it gets worse. The failure cases waste a huge amount of time.