1Pamwipeout User Manual(0)                            Pamwipeout User Manual(0)
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NAME

6       pamwipeout  -  replace detail with smooth gradient from one edge to the
7       other
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SYNOPSIS

11       pamwipeout {-lr | -tb} [filename]
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13       Minimum unique abbreviation of options is acceptable.  You may use dou‐
14       ble hyphens instead of single hyphen to denote options.
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DESCRIPTION

18       This program is part of Netpbm(1).
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20       The  pamwipeout  utility takes a Netpbm image as input and the uses two
21       opposite edges of the image to wipe out anything in between.   You  can
22       use  it  in  combination  with  pamcut and pnmpaste / pamcomp to remove
23       unwanted parts of a larger image.  The program replaces the  pixels  in
24       between the two edges with a gradient from one edge to the other.
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26       In  top-bottom  mode,  the  program  reads  the whole image into memory
27       before it can start processing.  In left-right it will read the image a
28       row  at  the  time,  process  that row and write it to the output file.
29       Therefore, in case of very large  images,  it  may  be  better  to  use
30       instead  of  "pamwipeout -tb" a pipe of "pamflip -cw | pamwipeout -lr |
31       pamflip -ccw".
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33       In his blog at
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35       www.i-am.ws ⟨http://www.i-am.ws/entry/pnmblend_disappearing_act⟩ ,  the
36       author  wrote  about  a  predecessor  of "pamwipeout" at the time named
37       "pnmblend". It shows a good example of what can  be  accomplished  with
38       this utility.
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PARAMETERS

42       Filename  is  the  name  of  the input file. If you don't specify this,
43       pamwipeout reads the image from Standard Input.
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OPTIONS

47       In addition to the options common to all programs  based  on  libnetpbm
48       (most notably -quiet, see
49        Common Options ⟨index.html#commonoptions⟩ ), pamwipeout recognizes the
50       following command line options:
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54       -tb | -lr
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56              This option chooses between a vertical and a  horizontal  gradi‐
57              ent.  You must specify one of these, but not both.
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SEE ALSO

63       pam(1) and pamflip(1), pamcut(1), pamcomp(1), pnmpaste(1).
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HISTORY

67       pamwipeout was new in Netpbm 10.54 (March 2011).
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AUTHORS

71       Willem van Schaik wrote this program in January 2011 and contributed it
72       to Netpbm.
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DOCUMENT SOURCE

75       This manual page was generated by the Netpbm tool 'makeman'  from  HTML
76       source.  The master documentation is at
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78              http://netpbm.sourceforge.net/doc/pamwipeout.html
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80netpbm documentation           26 February 2011      Pamwipeout User Manual(0)
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