1PSBLACK(1NCARG)                  NCAR GRAPHICS                 PSBLACK(1NCARG)
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NAME

6       psblack - PostScript filter.
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SYNOPSIS

9       psblack < input_PostScript_file > output_PostScript_file
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DESCRIPTION

12       psblack is a filter which reads a PostScript file as input and writes a
13       PostScript file as output.  In the output  file  the  filter  forces  a
14       black background and scales the intensity values (values with R=G=B) so
15       that any intensity greater than or equal to  .8  is  mapped  to  white.
16       This filter works only on PostScript files produced by ctrans - the CGM
17       translator in the NCAR Graphics software.
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SEE ALSO

20       ctrans(1NCARG), pswhite(1NCARG)
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23       Copyright (C) 1987-2002
24       University Corporation for Atmospheric Research
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26       This documentation is free software; you  can  redistribute  it  and/or
27       modify  it  under  the  terms of the GNU General Public License as pub‐
28       lished by the  Free  Software  Foundation;  either  version  2  of  the
29       License, or (at your option) any later version.
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31       This  software  is  distributed in the hope that it will be useful, but
32       WITHOUT ANY  WARRANTY;  without  even  the  implied  warranty  of  MER‐
33       CHANTABILITY  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
34       Public License for more details.
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36       You should have received a copy of the GNU General Public License along
37       with  this  software;  if  not,  write to the Free Software Foundation,
38       Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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42NCAR                               May 1993                    PSBLACK(1NCARG)
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