Is there a way to restrict the character set that tesseract-ocr will attempt to identify? I'm scanning USA-based receipts which have a fairly simple set of monospaced characters but, for example, often '1' will get misidentified as '|', and a whole host of other simple substitution errors. If I could just restrict tesseract to [-a-zA-Z0-9,.$()/] it would be an immediate boost to accuracy. (Hoping for a way that doesn't involved having to retrain from scratch on the limited set.)
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