pnmcolormap

Create quantization color map for a PNM image. More information: <https://netpbm.sourceforge.net/doc/pnmcolormap.html>.

Install

All systems
curl cmd.cat/pnmcolormap.sh
Debian Debian
apt-get install netpbm
Ubuntu
apt-get install netpbm
Arch Arch Linux
pacman -S netpbm
image/svg+xml Kali Linux
apt-get install netpbm
CentOS
yum install netpbm-progs
Fedora
dnf install netpbm-progs
Windows (WSL2)
sudo apt-get update sudo apt-get install netpbm
OS X
brew install netpbm
Raspbian
apt-get install netpbm

Create quantization color map for a PNM image. More information: <https://netpbm.sourceforge.net/doc/pnmcolormap.html>.

  • Generate an image using only `n_colors` or less colors as close as possible to the input image:
    pnmcolormap n_colors path/to/input.pnm > path/to/output.ppm
  • Use the splitspread strategy for determining the output colors, possibly producing a better result for images with small details:
    pnmcolormap -splitspread n_colors path/to/input.pnm > path/to/output.ppm
  • Sort the resulting colormap, which is useful for comparing colormaps:
    pnmcolormap -sort path/to/input.pnm > path/to/output.ppm

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