ppmhist
Print a histogram of the colors present in a PPM image. See also:
pgmhist
. More information: https://netpbm.sourceforge.net/doc/ppmhist.html.
- Generate the histogram for human reading:
ppmhist -nomap {{path/to/image.ppm}}
- Generate a PPM file of the colormap for the image, with the color histogram as comments:
ppmhist -map {{path/to/image.ppm}}
- Display version:
ppmhist -version