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I had a friend that goes through my pennies trying to find valuable rare pennies. Instead of looking at each one could a optical character recognition program be used to flag coins?

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closed as too broad by MBaz, Stanley Pawlukiewicz, AlexTP, A_A, lennon310 May 24 '18 at 3:59

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • $\begingroup$ I guess in princple it could. $\endgroup$ – MBaz May 23 '18 at 19:15
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Without seeing the coins it's not easy to give a unique solution. A possibility would be: Use the Hough transform to detect circles (the coin). Then do some open/close operations to get blocks of text, maybe apply Hough transform again to detect straight lines and finally, do the OCR.

Another possibility is to do template matching. If you have pictures of other similar coins then you can first find the coin orientation and then target the characters that you want to recognize.

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