pgmhist
Print a histogram of the values present in a PGM image.
See also: ppmhist
.
More information: https://netpbm.sourceforge.net/doc/pgmhist.html.
- Display the histogram for human reading:
pgmhist
path/to/image.pgm
- Display the median grey value:
pgmhist -median
path/to/image.pgm
- Display four quartile grey value:
pgmhist -quartile
path/to/image.pgm
- Report the existence of invalid grey values:
pgmhist -forensic
path/to/image.pgm
- Display machine-readable output:
pgmhist -machine
path/to/image.pgm