...The tool also allows to extract scans of multiple single photographs (i.e. without album)
Find a full documentation here: http://dominik-ruess.de/scannerExtract/
Note: The scanning itself is the most time consuming part. Maker sure you optimize that process. (see some hints on the link above.)
Hint: **I NEED YOUR DATA**. If you have scans which won't be recognized well give me these (If they're not too personal etc - I won't use it for anything else than to improve this software).
You might be interested in my other photography project (organize photographs and videos): https://sourceforge.net/projects/pivot-photo/