rgb3toppm(1) on Linux
The text 43e436203c8f, as Debian 13 (Trixie), Debian 12 (Bookworm) shipped it.
combine three PGM images (R, G, B) into one PPM image
The text 43e436203c8f, as Debian 13 (Trixie), Debian 12 (Bookworm) shipped it.
combine three PGM images (R, G, B) into one PPM image