Source of Potrace

[[SVG]] | [[Vectorize]]

- Potrace - Transforming bitmaps into vector graphics
--  http://potrace.sourceforge.net/

試したけど全然駄目だった。
- https://twitter.com/yoya/status/851815594290593793


- https://ourcodeworld.com/articles/read/767/how-to-digitize-and-vectorize-signatures-from-a-picture-with-potrace-cli