ppmtomap

Extract colormap from PPM image

TLDR

Extract colormap from image

$ ppmtomap [input.ppm] > [colormap.ppm]

Sort colors by frequency

$ ppmtomap -sort [input.ppm] > [colormap.ppm]

SYNOPSIS

ppmtomap [options] [file]

DESCRIPTION

ppmtomap extracts the unique colors from a PPM image as a one-row colormap image. Useful for analyzing or transferring palettes. Part of Netpbm toolkit.

PARAMETERS

-sort

Sort colors by frequency.

-square

Make output square.

INSTALL

sudo apt install netpbm

sudo dnf install netpbm

sudo pacman -S netpbm

sudo apk add netpbm

sudo zypper install netpbm

brew install netpbm

nix profile install nixpkgs#netpbm