Pamwipeout User Manual(1) General Commands Manual Pamwipeout User Manual(1)
NAME
pamwipeout - replace detail with smooth gradient from one edge to the
other
SYNOPSIS
pamwipeout {-lr | -tb} [filename]
Minimum unique abbreviation of options is acceptable. You may use dou-
ble hyphens instead of single hyphen to denote options.
DESCRIPTION
This program is part of Netpbm(1).
The pamwipeout utility takes a Netpbm image as input and the uses two
opposite edges of the image to wipe out anything in between. You can
use it in combination with pamcut and pnmpaste / pamcomp to remove un-
wanted parts of a larger image. The program replaces the pixels in be-
tween the two edges with a gradient from one edge to the other.
In top-bottom mode, the program reads the whole image into memory be-
fore it can start processing. In left-right it will read the image a
row at the time, process that row and write it to the output file.
Therefore, in case of very large images, it may be better to use in-
stead of "pamwipeout -tb" a pipe of "pamflip -cw | pamwipeout -lr |
pamflip -ccw".
In his blog at
www.i-am.ws ⟨http://www.i-am.ws/entry/pnmblend_disappearing_act⟩ , the
author wrote about a predecessor of "pamwipeout" at the time named "pn-
mblend". It shows a good example of what can be accomplished with this
utility.
PARAMETERS
Filename is the name of the input file. If you don't specify this,
pamwipeout reads the image from Standard Input.
OPTIONS
In addition to the options common to all programs based on libnetpbm
(most notably -quiet, see
Common Options ⟨index.html#commonoptions⟩ ), pamwipeout recognizes the
following command line options:
-tb | -lr
This option chooses between a vertical and a horizontal gradi-
ent. You must specify one of these, but not both.
SEE ALSO
pam(1) and pamflip(1), pamcut(1), pamcomp(1), pnmpaste(1).
HISTORY
pamwipeout was new in Netpbm 10.54 (March 2011).
AUTHORS
Willem van Schaik wrote this program in January 2011 and contributed it
to Netpbm.
DOCUMENT SOURCE
This manual page was generated by the Netpbm tool 'makeman' from HTML
source. The master documentation is at
http://netpbm.sourceforge.net/doc/pamwipeout.html
netpbm documentation 26 February 2011 Pamwipeout User Manual(1)
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