Generate Grayscale PPM - Convert PPM Images | Online Free DevTools by Hexmos
Generate grayscale PPM images with ppmdist. Convert color PPM images to grayscale PGM format. Free online tool, no registration required.
ppmdist
Produce a grayscale version of a PPM image. More information: https://netpbm.sourceforge.net/doc/ppmdist.html.
- Produce a grayscale version of the specified PPM image:
ppmdist {{path/to/input.ppm}} > {{path/to/output.pgm}}
- Use the specified method to map colors to graylevels:
ppmdist -{{frequency|intensity}} {{path/to/input.ppm}} > {{path/to/output.pgm}}