PPMNTSC

NAME

      ppmntsc - make a portable pixmap look like taken from an American TV

SYNOPSIS

      ppmntsc dimfactor [ppmfile]

DESCRIPTION

      Reads a portable pixmap as input. Dims every other row of image data
      down by the specified dim factor. This factor may be in the range of
      0.0 (the alternate lines are totally black) to 1.0 (original image).
      This creates an effect similar to what I've once seen in the video
      clip 'You could be mine' by Guns'n'Roses. In the scene I'm talking
      about you can see John Connor on his motorbike, looking up from the
      water trench (?) he's standing in. While the camera pulls back, the
      image gets 'normal' by brightening up the alternate rows of it. I
      thought this would be an interesting effect to try in MPEG. I did not
      yet check this out, however. Try for yourself.

DEMONSTRATION

      Let a.ppm be a portable pixmap.
      The following command will make it look like taken from an American TV:
	ppmmerge ppm a.ppm > a.ppm

BEFORE

AFTER

SEE ALSO

      ppm(5), ppmdim(1)

AUTHOR

      Copyright (C) 1993 by Frank Neumann