The "easy" way to do this is to run the edge detection *twice*. In other words, ...

TheLoneWolfling on July 4, 2015 | parent | context | favorite | on: Show HN: Trigrad, a novel image compression with i...

The "easy" way to do this is to run the edge detection twice. In other words, run edge detection, then run edge detection on the result of the edge detection.