Not really a patch, but perhaps somebody finds it useful.
I have a bunch of hand-written lecture notes. I decided
to scan them and convert scanned images to xoj format,
so I could edit them with Xournal.
I wrote a script which does exactly this. It uses
autotrace to convert bitmaps to vector form, massages
the output using pstoedit (replacing curves by linear paths), and finally writes .xoj file.
Please see README and TUTORIAL files.
If you need to scan your paper notes quickly using
a scanner with document feeder and using the command
line without fiddling with GUI, read my tutorial
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