[D] using computers to find errors in circulating currency?
Lately there seems to be a developed increase in coin collecting. Especially in circulated change in the US. As a long time coin collector and computer guru. Would it make sense to create a paid app to do this for ordinary people? Simply take a pic or front and back and get: 1)Estimated Grade 2)Metal composition 3)Unique (Rare) Features 4)Estimater Market Valeu