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pnmsmooth General Commands Manual pnmsmooth

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 gener‐
ates a PGM convolution matrix and then invokes pnmconvol.

OPTIONS

-size width height
Specifies the size of the convolution matrix. Default size is a
3×3 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(5)

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

4 December 1994 pnmsmooth

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