A bitmap vectorizer that can trace along the centerline of a stroke. The builtin inkscape 'trace bitmap' can only trace edges, thus resulting in double lines for most basic use cases. It uses 'autotrace -centerline' and an optimal threshold to vectorize a pixel image.
Here are the full steps I took for this to work on Mac (I am a noob, had a friend help me through this) first I had to install brew: https://brew.sh/ then, I opened Terminal and input: /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)" then (and subsequently) in Terminal: brew install python curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py python3 -m pip install --upgrade pip python3 -m pip install --upgrade Pillow then I drag the autoscape app icon from the extensions folder into terminal for the full file paths, mine looked like this: /Applications/Inkscape.app/Contents/Resources/share/inkscape/extensions/ then I typed: cd /Applications/Inkscape.app/Contents/Resources/share/inkscape/extensions/ curl https://raw.githubusercontent.com/fablabnbg/inkscape-centerline-trace/master/centerline-trace.py -o centerline-trace.py curl https://raw.githubusercontent.com/fablabnbg/inkscape-centerline-trace/master/centerline-trace.inx -o centerline-trace.inx
I hope this helps others! I am still struggling with getting it to work inside Inkscape, but that is a different thing.