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Pamoil User Manual
.SH 1
pamoil
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Updated: 25 June 2001
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Table Of Contents
.SH 2
NAME
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pamoil - turn a PAM image into an oil painting
.SH 2
SYNOPSIS
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\fBpamoil\fR
[\fB-n\fR \fIN\fR]
[\fIpamfile\fR]
.SH 2
DESCRIPTION
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This program is part of Netpbm.
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\fBpamoil\fR reads a Netpbm image as input and does an "oil
transfer", and writes the same type of Netpbm image as output.
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The oil transfer is described in "Beyond Photography" by
Holzmann, chapter 4, photo 7.  It's a sort of localized smearing.
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The smearing works like this: First, assume a grayscale image.  For
each pixel in the image, \fBpamoil\fR looks at a square neighborhood
around it.  \fBpamoil\fR determines what is the most common pixel
intensity in the neighborhood, and puts a pixel of that intensity into
the output in the same position as the input pixel.
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For color images, or any arbitrary multi-channel image,
\fBpamoil\fR computes each channel (e.g. red, green, and blue)
separately the same way as the grayscale case above.
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At the edges of the image, where the regular neighborhood would run
off the edge of the image, \fBpamoil\fR uses a clipped neighborhood.
.SH 2
OPTIONS
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.RS
.IP "\fB-n\fR \fIsize\fR"
This is the size of the neighborhood used in the smearing.  The
neighborhood is this many pixels in all four directions.
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The default is 3.
.RE
.SH 2
SEE ALSO
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\fBpgmbentley\fR,
\fBppmrelief\fR,
\fBppm\fR
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.SH 2
AUTHOR
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This program is based on pgmoil Copyright (C) 1990 by Wilson Bent
(whb@hoh-2.att.com)
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Modified to ppm by Chris Sheppard, June 25, 2001
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Modified to pnm, using pam functions, by Bryan Henderson June 28,
2001.
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Table Of Contents
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AUTHOR
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