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 double 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
       unwanted parts of a larger image.  The program replaces the pixels  in  between  the  two  edges  with  a
       gradient from one edge to the other.

       In  top-bottom  mode,  the  program reads the whole image into memory before 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 instead 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 "pnmblend". 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 gradient.  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