pnmgamma(1) on Linux
The text 55e5ac912da5, as Debian 13 (Trixie), Debian 12 (Bookworm) shipped it.
perform gamma adjustment on a PNM image
Flags it lists
-
-bgamma -
-bt709ramp -
-bt709tolinear -
-bt709tosrgb -
-cieramp -
-gamma -
-ggamma -
-lineartobt709 -
-maxval -
-rgamma -
-srgbramp -
-srgbtobt709 -
-ungamma