I think it's mostly for OCR'ing high-resolution scans of printed media. I scanned and OCR'd a several hundred page printed book (my grandfather's memoirs) with

I think it's mostly for OCR'ing high-resolution scans of printed media. I scanned and OCR'd a several hundred page printed book (my grandfather's memoirs) with great results. The text needed very little processing. But I had to manually transcribe all of the image captions, because they were scans of photocopies of photocopies of typewriter labels stuck to photos by hand, and thus very poor quality, and Tesseract produced complete gibberish.