Hey! THis thread is pretty old, but I hope my 2 cents would still be helpful. In case you're still looking for a camera for OCR, the M5Camera and UnitV are both good options, but keep in mind that OCR technology is not solely dependent on the camera. The software you use is equally important. Have you considered trying out this automatic document scanning and OCR service? It can help you recognize text, numbers, and even colors from an image. You can find more info at https://smartengines.com/. Best wishes!!
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RE: Which camera for OCR?