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  • LINUX man pages
  • Linux Man Page Viewer


    The following form allows you to view linux man pages.

    Command:

    pnmcrop

    
    
    

    SYNOPSIS

           pnmcrop  [-white|-black|-sides] [-left] [-right] [-top] [-bottom] [pnm-
           file]
    
           All options may be abbreviated to their shortest unique prefix or spec-
           ified with double hyphens.
    
    
    

    DESCRIPTION

           Reads  a PBM, PGM, or PPM image as input.  Removes borders that are the
           background color, and produces the same type of image as output.
    
           If you don't specify otherwise, pnmcrop assumes the background color is
           whatever  color  the top left and right corners of the image are and if
           they are different colors, something  midway  between  them.   You  can
           specify  that  the  background  is  white  or black with the -white and
           -black options or make pnmcrop base  its  guess  on  all  four  corners
           instead of just two with -sides.
    
           By  default, pnmcrop chops off any stripe of background color it finds,
           on all four sides.  You can tell pnmcrop to remove only  specific  bor-
           ders with the -left, -right, -top, and -bottom options.
    
           If  you  want  to  chop a specific amount off the side of an image, use
           pnmcut.
    
           If you want to add different borders after removing the existing  ones,
           use pnmcat or pnmcomp.
    
    
    

    OPTIONS

           -white Take  white to be the background color.  pnmcrop removes borders
                  which are white.
    
           -black Take black to be the background color.  pnmcrop removes  borders
                  which are black.
    
           -sides Determine  the background color from the colors of the four cor-
                  ners of the input image.  pnmcrop removes borders which  are  of
                  the background color.
    
                  If  at  least three of the four corners are the same color, pnm-
                  crop takes that as the background color.  If not, pnmcrop  looks
                  for two corners of the same color in the following order, taking
                  the first found as the background color: top, left, right,  bot-
                  tom.   If all four corners are different colors, pnmcrop assumes
                  an average of the four colors as the background color.
    
                  The -sides option slows pnmcrop down, as  it  reads  the  entire
                  image to determine the background color in addition to the up to
                  three times that it would read it without -sides.
    
    
    
    

    SEE ALSO

           pnmcut(1), pnmfile(1), pnm(5)
    
    
    

    AUTHOR

           Copyright (C) 1989 by Jef Poskanzer.
    
                                     18 March 2001                      pnmcrop(1)
    
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