pamtopdbimg(1) on Linux
The text 8a6b90b86ca5, as Debian 13 (Trixie) shipped it.
convert a Netpbm image to a Palm Pilot Image Viewer PDB Image
Flags it lists
-
-4depth -
-compressed -
-fixedtime -
-maybecompressed -
-notefile -
-title -
-uncompressed