pgmbentley(1) General Commands Manual pgmbentley(1)NAME
pgmbentley - Bentleyize a portable graymap
Reads a portable graymap as input. Performs The Bentley Effect, and writes a portable graymap as output.
The Bentley Effect is described in "Beyond Photography" by Holzmann, chapter 4, photo 4. It's a vertical smearing based on brightness.
SEE ALSO pgmoil(1), ppmrelief(1), pgm(5)AUTHOR
Copyright (C) 1990 by Wilson Bent (email@example.com)
11 January 1991 pgmbentley(1)
Check Out this Related Man Page
pamoil(1) General Commands Manual pamoil(1)NAME
pamoil - turn a PAM image into an oil painting
pamoil [-n N] [pamfile]
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 (firstname.lastname@example.org)
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)
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