hipstopgm
Read a HIPS file as input and return a PGM image as output.
TLDR
Convert a HIPS file into a PGM image
$ hipstopgm [path/to/file.hips]
Suppress all informational messages
$ hipstopgm -quiet
Display version
$ hipstopgm -version
Convert a HIPS file into a PGM image