[retrography]

I am in academia and I often have to read old documents that do not exist in digital format, and thus I have to digitize them myself using our copying machine (gives you PDFs with jbig2 + invisible text on top).

I have noticed that PocketBook's default e-reader (on Inkpad 3) is extremely finicky with jbig2 images (the best format for scanned text), and often fails on larger images, even when Ko-reader can handle the file.

Moreover, PocketBook seems to have great problems identifying text in the scanned files, whether the file uses a superposed image/text format or it uses the more advanced Acrobat ClearScan format. Actually, which file works and which one not seems to a completely random variable.

I wanted to know if anyone here has had success with a specific workflow for producing scanned PDFs appropriate for reading and annotation on PocketBook devices. For instance, whether a specific format, or a specific version of a software are more likely to produce compatible files.