pgmenhance

Edge-enhance a PGM image. See also: pamedge. More information: https://netpbm.sourceforge.net/doc/pgmenhance.html.

• Edge-enhance a PGM image:

pgmenhance path/to/image.pgm > path/to/output.pgm

• Specify the level of enhancement:

pgmenhance -1..9 path/to/image.pgm > path/to/output.pgm