PPM Dither - Reduce Image Colors | Online Free DevTools by Hexmos
Dither images with PPM Dither, reducing color palettes for optimized file sizes. Free online tool, no registration required.
ppmdither
Reduce the number of colors in an image by applying dithering. More information: https://netpbm.sourceforge.net/doc/ppmdither.html.
- Read a PPM image, apply dithering and save it to a file:
ppmdither {{path/to/image.ppm}} > {{path/to/file.ppm}}
- Specify the desired number of shades for each primary color:
ppmdither {{[-r|-red]}} {{2}} {{[-g|-green]}} {{3}} {{[-b|-blue]}} {{2}} {{path/to/image.ppm}} > {{path/to/file.ppm}}
- Specify the dimensions of the dithering matrix:
ppmdither {{[-d|-dim]}} {{2}} {{path/to/image.ppm}} > {{path/to/file.ppm}}