imgvtopnm(1) on Linux
The text 2816531f8b18, as Debian 6.0 (Squeeze), Debian 5.0 (Lenny), Debian 4.0 (Etch) shipped it.
Pilot Image Viewer pdb to PGM/PBM converter.
Flags it lists
-
-h -
-n -
-p -
-r -
-v