See https://stackoverflow.com/questions/46009161/tesseract-ocr-cant-recognize-basic-alphanumeric-codes
One answer suggests training Tesseract, but I am skeptical that this is the right solution, because I'm not introducing any new fonts, and I want Tesseract to be able to recognize these alphanumeric characters for any font. I'm looking for opinions to either persuade or dissuade me from training Tesseract. Thanks, Michael -- You received this message because you are subscribed to the Google Groups "tesseract-ocr" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/tesseract-ocr. To view this discussion on the web visit https://groups.google.com/d/msgid/tesseract-ocr/47396dd9-40c1-4e48-81bd-66d9df8367b0%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.

