You can find some software tools that should be able to help you with conversion of individual pages from a *.djvu document to individual JPG images.
Convert DjVu image file to JPEG bitmap image format.
We found 2 software records in the database related to .djvu to .jpg file format conversion.
Articles and other information relating to djvu into jpg conversion:
How to open and covert DjVu documents - Working with DjVu file format
Microsoft Windows software - convert djvu to jpg on Windows
One of the best free DjVu viewers and converters
Convert from djvu file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned djvu to jpg. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
A DjVu converter