I'm not particulary interested in discussing alternative formats in this request, such as a bunch of jpg's or pdf.
Djvusolo also fall off because of poor output quality (and it's very old software).

I do some documents scans during a year. I've using some time to find the best suitable format for reading. I omit too much details - I found that DJVU format is the best suitable for scanned documents.

My needs doesn't include OCR, just the image format.

It would be great being able to convert some of the old jpg's (not important stuff) into one djvu file.