How does OCR software integrate letter and language models? Do they first make a best guess at the letters and then try to correct it with the language model? h

How does OCR software integrate letter and language models? Do they first make a best guess at the letters and then try to correct it with the language model? https://en.wikipedia.org/wiki/Optical_character_recognition#Techniques https://en.wikipedia.org/wiki/Optical_character_recognition#... gives me that impression, but I'm not sure. Brains are said to have a lot of feedback from higher levels of sensory processing to lower. Maybe you don't need as good a language model if its evidence is integrated more tightly with the rest.