Not really. Proper OCR in the broadest sense (extracting text from arbitrary pdfs that intermingle tables, images, etc, or from hand written artistic posters)

Not really. Proper OCR in the broadest sense (extracting text from arbitrary pdfs that intermingle tables, images, etc, or from hand written artistic posters) requires a full understanding of semantic intent. You are perhaps imagining more constrained scenarios of straight lines of consistent text on a page with well-known artifacts of "noise" (smudges, print imperfections, and so on).