# pnmsmooth

Updated: 4 December 1994
Index

## NAME

pnmsmooth - smooth out an image

## SYNOPSIS

pnmsmooth [-size width height] [-dump dumpfile] [pnmfile]

## DESCRIPTION

Smooths out an image by replacing each pixel with the average of its width X height neighbors. It is implemented as a C progam that generates a PGM convolution matrix and then invokes pnmconvol.

## OPTIONS

-size width height
  Specifies the size of the convolution matrix. Default size is a 3x3 matrix. Width and height sizes must be odd. Maximum size of convolution matrix is limited by the maximum value for a pixel such that (width * height * 2) must not exceed the maximum pixel value.
-dump dumpfile
  Generates and saves the convolution file only. Use of this option does not invoke pnmconvol.

## SEE ALSO

pnmconvol, pnm

## AUTHORS

Copyright (C) 1989, 1991 by Jef Poskanzer.
Converted from script to C program December 1994 by Mike Burns (burns@chem.psu.edu).

## Index

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
SEE ALSO
AUTHORS