ppmwheel(1) - phpMan

Ppmwheel User Manual(0)                                                   Ppmwheel User Manual(0)



NAME
       ppmwheel - make a PPM image of a color wheel


SYNOPSIS
       ppmwheel diameter


DESCRIPTION
       This program is part of Netpbm(1).

       ppmwheel  produces  a  PPM image of a color wheel of the specified diameter inside a white
       square just large enough to hold it.

       The color wheel is based on the HSV color model.  Hues are  distributed  angularly  around
       the  circle and the values are distributed radially and the saturation is zero everywhere.
       The values are zero at the center, increasing linearly to maximum at the edge.  The  maxi-
       mum value corresponds to the maxval of the PPM image.

       Hence,  the  image  contains all of the secondary colors based on the red, green, and blue
       primary colors.  A secondary color is one that is composed of light of at most two of  the
       three primary colors.


OPTIONS
       None.


SEE ALSO
       ppmcie(1), ppmrainbow(1), ppm(1)


HISTORY
       ppmwheel was added to Netpbm in Release 10.14 (March 2003).



AUTHOR
       Copyright (C) 1995 by Peter Kirchgessner

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/ppmwheel.html

netpbm documentation                     11 January 2003                  Ppmwheel User Manual(0)

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