freebsd man page for ppmdim

ppmdim(1)                                                     General Commands Manual                                                    ppmdim(1)

NAME
       ppmdim - dim a portable pixmap down to total blackness

SYNOPSIS
       ppmdim dimfactor [ppmfile]

DESCRIPTION
       Reads  a  portable  pixmap as input. Diminishes its brightness by the specified dimfactor down to total blackness.  The dimfactor may be in
       the range from 0.0 (total blackness, deep night, nada, null, nothing) to 1.0 (original picture's brightness).

       As pnmgamma does not do the brightness correction in the way I wanted it, this small program was written.

       ppmdim is similar to ppmbrighten , but not exactly the same.

SEE ALSO
       ppm(5), ppmflash(1), pnmgamma(1), ppmbrighten(1)

AUTHOR
       Copyright (C) 1993 by Frank Neumann

                                                                 16 November 1993                                                        ppmdim(1)