pnmcolormap Command Examples
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}}