Just my two pennies worth on OCR. I use OCRmyPDF a lot and have it running locally, but it is always a little hit and miss depending on the format of the text in the document. I have played a lot with selecting different options in Tesseract to get better results but with little success on problem documents. I have an old copy of Finereader on an old W10 box and often drop back to that to get a clean result, but only for useful stuff, and those I spend the time spellchecking. Tesseract is not a good base to convert a scanned PDF into a âword processorâ document which Finereader is a lot more capable of doing.
All that said, on the whole having thrown a lot of magazines through the scanner and added search to them, they work well once then fed into FTS options. I can find the mags containing a particular target easily enough direct from Dolphin and the same capability should work well enough in Nextcloud?