pnmsmooth [-width=cols] [-height=rows] [-dump=dumpfile] [pnmfile]
Minimum unique abbreviations of options is acceptable. You may use
double hyphens instead of single hyphen to denote options. You may
use white space in place of the equals sign to separate an option name
from its value.
This program is part of Netpbm.
pnmsmooth smoothes out an image by replacing each pixel with the aver-
age of its width X height neighbors. It is implemented as a progam
that generates a PGM convolution matrix and then invokes pnmconvol
-size This deprecated option exists in current Netpbm for backward
Before Netpbm 10.32 (February 2006), pnmsmooth did not use the modern
Netpbm command line parser, so had an unconventional command line syn-
tax. Most importantly, you could not use an equal size or double
hyphens in the options.
netpbm documentation 4 December 1994 Pnmsmooth User Manual(0)