pnmsmooth - smooth out an image
2. SYNOPSIS ▲
pnmsmooth [ -size width height ] [ -dump dumpfile ] [ pnmfile ]
3. 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 .
4. 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.
Generates and saves the convolution file only. Use of this option does not invoke pnmconvol.
5. SEE ALSO ▲
6. AUTHORS ▲
Copyright (C) 1989, 1991 by Jef Poskanzer.
Converted from script to C program December 1994 by Mike Burns ().