ppmbrighten (1) - Linux Manuals

ppmbrighten: change an images Saturation and Value from an HSV map

NAME

ppmbrighten - change an images Saturation and Value from an HSV map

SYNOPSIS

ppmbrighten [-n] [-s <+- saturation>] [-v <+- value>] <ppmfile>

DESCRIPTION

Reads a portable pixmap as input. Converts the image from RGB space to HSV space and changes the Value by <+- value> as a percentage. Likewise with the Saturation. Doubling the Value would involve

ppmbrighten -v 100

to add 100 percent to the Value.

The 'n' option normalizes the Value to exist between 0 and 1 (normalized).

AUTHOR

Copyright (C) 1990 by Brian Moffet Copyright (C) 1989 by Jef Poskanzer.

Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation. This software is provided "as is" without express or implied warranty.

NOTES

This program does not change the number of colors.

SEE ALSO

pgmnorm(1), ppm(5)

Pages related to ppmbrighten

  • ppm2tiff (1) - create a
  • ppm3d (1) - convert two portable pixmap into a red/blue 3d glasses pixmap
  • ppmchange (1) - change all pixels of one color to another in a portable pixmap
  • ppmcie (1) - draw a CIE color chart as a PPM image
  • ppmcolormask (1) - produce mask of areas of a certain color in a PPM file
  • ppmcolors (1) - generate a color map of all colors of a certain maxval
  • ppmdcfont (1) - Turn a Ppmdfont file into C source for a builtin font