pnmalias(1) - phpMan

Pnmalias User Manual(0)                                                   Pnmalias User Manual(0)



NAME
       pnmalias - antialias a PNM image


SYNOPSIS
       pnmalias

       [-bgcolor color]

       [-fgcolor color]

       [-bonly]

       [-fonly]

       [-balias]

       [-falias]

       [-weight w]

       [pnmfile]


DESCRIPTION
       This program is part of Netpbm(1).

       pnmalias  reads  a  PNM  image as input, and applies anti-aliasing to background and fore-
       ground pixels.  If the input file is a PBM,  pnmalias  promotes  the  output  anti-aliased
       image to a PGM, and prints a message informing the user of the change in format.


OPTIONS
       -bgcolor colorb sets the background color the colorb.

       -fgcolor colorf sets the foreground color to colorf.

       Pixels  with these values will be anti-aliased.  By default, pnmalias takes the background
       color to be black, and foreground color to be white.

       Specify the color (color) as described for the argument of  the  ppm_parsecolor()  library
       routine <libppm.html#colorname> .

       Note  that even when dealing with PGMs, background and foreground colors need to be speci-
       fied in the fashion described above.  In this case,  pnmalias  takes  the  background  and
       foreground pixel values to be the value of the red component for the specified color.

       -bonly says to apply anti-aliasing only to the background pixels.

       -fonly says to apply anti-aliasing only to the foreground pixels.

       -balias says to apply anti-aliasing to all pixels surrounding background pixels.

       -falias says to apply anti-aliasing to all pixels surrounding foreground pixels.

       If  you  specify  neither  -balias  nor -falias, pnmalias applies anti-aliasing only among
       neighboring background and foreground pixels.

       -weight w says to use w as the central weight for the aliasing filter.  w must be  a  real
       number  in  the  range  0 < w < 1.  The lower the value of w is, the "blurrier" the output
       image is.  The default is w = 1/3.


SEE ALSO
       pbmtext(1), pnmsmooth(1), pnm(1)


AUTHOR
       Copyright (C) 1992 by Alberto Accomazzi, Smithsonian Astrophysical Observatory.

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/pnmalias.html

netpbm documentation                      15 March 2004                   Pnmalias User Manual(0)

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