rgb3toppm - combine three PGM images (R, G, B) into one PPM image
rgb3toppm redpgmfile greenpgmfile bluepgmfile
This program is part of Netpbm(1).
rgb3toppm reads three PGM images as input, taking each to represent one component (red, green, and blue) of a color image. It produces a PPM image as output.
There are no command line options defined specifically
for rgb3toppm, but it recognizes the options common to all
programs based on libnetpbm (See
Common Options .)