pgmmorphconv

Updated: 29 October 2002
Index  

NAME

pgmmorphconv - perform morphological convolutions - dilation, erosion  

SYNOPSIS

pgmmorphconv [ -erode | -dilate | -open | -close ] pgmfile  

DESCRIPTION

pgmmorphconv performs morphological convolutions on a PGM image: dilation and erosion.

pgmmorphconv performs a "topological" convolution, which is similar to the continuous convolution done by pnmconvol, except that the resulting picture is not a weighted product of its neighbors as defined by a convolution mask, but the minimum or maximum of its neighbors.

This convolution changes the three Minkowski integrals in a predefined way, an can be used to filter an image to enhance certain features, to ease their automatic recognition.

The -open option first performs the erode and then the dilate operation. The -close option does a dilate first and then an erode.  

SEE ALSO

pgmminkowski pgm

 

AUTHORS

Luuk van Dijk, 2001.

Based on work which is Copyright (C) 1989, 1991 by Jef Poskanzer.


 

Index

NAME
SYNOPSIS
DESCRIPTION
SEE ALSO
AUTHORS