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