ppmrelief(1) [x11r4 man page]

ppmrelief(1)						      General Commands Manual						      ppmrelief(1)

NAME

       ppmrelief - run a Laplacian relief filter on a portable pixmap

SYNOPSIS

       ppmrelief [ppmfile]

DESCRIPTION

       Reads a portable pixmap as input.  Does a Laplacian relief filter, and writes a portable pixmap as output.

       The Laplacian relief filter is described in "Beyond Photography" by Holzmann, equation 3.19.  It's a sort of edge-detection.

SEE ALSO

       pgmbentley(1), pgmoil(1), ppm(5)

AUTHOR

       Copyright (C) 1990 by Wilson Bent (whb@hoh-2.att.com)

								  11 January 1991						      ppmrelief(1)

pamoil(1)						      General Commands Manual							 pamoil(1)

NAME

       pamoil - turn a PAM image into an oil painting

SYNOPSIS

       pamoil [-n N] [pamfile]

DESCRIPTION

       Reads a Netpbm image as input.  Does an "oil transfer", and writes the same type of Netpbm image as output.

       The oil transfer is described in "Beyond Photography" by Holzmann, chapter 4, photo 7.  It's a sort of localized smearing.

       The  smearing  works like this: First, assume a grayscale image.  For each pixel in the image, pamoil looks at a square neighborhood around
       it.  pamoil 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.

       For color images, or any arbitrary multi-channel image, pamoil computes each channel (e.g. red, green, and blue) separately the same way as
       the grayscale case above.

       At the edges of the image, where the regular neighborhood would run off the edge of the image, pamoil uses a clipped neighborhood.

OPTIONS

       -n size
	      This is the size of the neighborhood used in the smearing.  The neighborhood is this many pixels in all four directions.

	      The default is 3.

SEE ALSO

       pgmbentley(1), ppmrelief(1), ppm(5)

AUTHOR

       Based on pgmoil Copyright (C) 1990 by Wilson Bent (whb@hoh-2.att.com)

       Modified to ppm by Chris Sheppard, June 25, 2001

       Modified to pnm, using pam functions, by Bryan Henderson June 28, 2001.

								   25 June 2001 							 pamoil(1)