The issues faced at the time where cost (there were perhaps two or three scanners on campus, that I knew about, and we were a leading computer science school) and revenue generation. I am quite glad these are now long over-due being addressed, but I do worry history students now aren't learning the solid research skills we developed and acquired twenty years ago, with basic research being so much easier now. Though the volume of research being able to be conducted in a much shorter timeframe is very favourable.
A few years ago I was writing web applications to support transcription of images of medieval documents in Old French- avoiding close-to-insurmountable OCR problems using grad students, but that still requires segmenting images properly. The LDS church does similar stuff on a very large scale to digitize genealogical records. It makes research a whole lot easier, but there's still plenty of room for improvement; image maps don't always reliably match up with the fields that you're trying to read/transcribe on images of documents, and that's kind of a pain.
I do medieval and renaissance dance reconstruction and dance performance. Having just been to an event, I took a class on the Dances of the Gresley Manuscript.
Well, what is this manuscript? It isn't a dance treatise, or anything of the sort. Gresley was a law student from the 1530-1550's (we know from latter court cases by a lawyer Gresley). These dance instructions come from the margins of his law book.
He wrote in musical notation, dance notation and other descriptive words. He even left words that have no meaning in the dance community. We have to deduce what he meant by a multitude of methods, none of which we can guarantee.
But back to the topic of OCR... How does these document scanners and OCR's plan to deduce this kind of source written in the margins?
But back to the topic of OCR... How does these document scanners and OCR's plan to deduce this kind of source written in the margins?
I have no idea; probably they don't, yet. Everything I've worked on uses students' eyeballs to do the actual character recognition, so I'm not deeply familiar with the state of the art. I do know that OCR is mainly used for documents that have a well-defined structure where you can make an image map identifying different semantic fields, and the contextual field information allows for much more intelligent OCR; it's not so good for big blocks of paragraph text.When you get to figuring out stuff scrawled in the margins, there are image pre-processing techniques that can identify regions of handwriting and then normalize it by rotation and scaling, but I'm pretty sure a complete solution is still in the realm of stuff considered AI (because, of course, once you know how to do it reliably, it becomes machine learning or pattern matching or something like that and no one calls it AI anymore).
Protip for the college kids: If you're a computer science person who really like history, take courses that will teach you how to process large datasets. Then you can be on the leading edge of historical research!