pnmremap
Replace the colors in a PNM image. tldr-pages
On several platforms
Several platforms
Replace the colors in an image with those in the specified color palette
pnmremap -mapfile path/to/palette_file.ppm path/to/input.pnm >path/to/output.pnmIdentifyUse Floyd-Steinberg dithering for representing colors missing in the color palette
pnmremap -mapfile path/to/palette_file.ppm -floyd path/to/input.pnm >path/to/output.pnmIdentifyUse the first color in the palette for representing colors missing in the color palette
pnmremap -mapfile path/to/palette_file.ppm -firstisdefault path/to/input.pnm >path/to/output.pnmIdentifyUse the specified color for representing colors missing in the color palette
pnmremap -mapfile path/to/palette_file.ppm -missingcolor color path/to/input.pnm >path/to/output.pnmIdentify