NAME

       ppmspread - displace a PPM image's pixels by a random amount

SYNOPSIS

       ppmspread amount [ppmfile] [-randomseed=integer]

DESCRIPTION

       This program is part of Netpbm(1).

       ppmspread  reads  a PPM image as input and moves every pixel around a random bit relative to its original
       position. amount determines by how many pixels a pixel is to be moved around at most.

       Pictures processed with this filter will seem to be  somewhat  dissolved  or  unfocussed  (although  they
       appear more coarse than images processed by something like pnmconvol).

       The  randomness  in  the  image  is limited before Netpbm 10.37 (December 2006) -- if you run the program
       twice in the same second, you may get identical output.

OPTIONS

       In addition to the options common to all programs based on libnetpbm (most notably  -quiet,  see   Common
       Options ), ppmspread recognizes the following command line options:

       -randomseed=integer
              This is the seed for the random number generator that generates the pixels.

              Use this to ensure you get the same image on separate invocations.

              This option was new in Netpbm 10.94 (March 2021).

SEE ALSO

       ppm(1), pnmconvol(1)

AUTHOR

       Copyright (C) 1993 by Frank Neumann

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/ppmspread.html

netpbm documentation                              06 March 2021                         Ppmspread User Manual(1)