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Ppmntsc User Manual(0)							   Ppmntsc User Manual(0)

       ppmntsc - Make RGB colors legal for NTSC or PAL color systems.


       [--pal] [--legalonly] [--illegalonly] [--correctedonly] [--verbose] [--debug] [infile]

       Minimum unique abbreviations of options are acceptable.

       This program is part of Netpbm(1)

       This  program makes colors legal in the NTSC (or PAL) color systems.  Often, images gener-
       ated on the computer are made for use in movies which ultimately end up	on  a  television
       screen.	 However,  the	range  of colors (as specified by their RGB values) on a computer
       does not match the range of colors that can be represented using the NTSC  (or  PAL)  sys-
       tems.  If an image with 'illegal' colors is sent directly to an NTSC (or PAL) video system
       for recording, the 'illegal' colors will be clipped.  This may result  in  an  undesirable
       looking picture.

       This  utility  tests  each  pixel in an image to see if it falls within the legal NTSC (or
       PAL) range.  If not, it raises or lowers the pixel's saturation in the output so  that  it
       does  fall  within  legal  limits.  Pixels that are already OK just go unmodified into the

       Input is from the file named input.  If input is -, input is from Standard Input.  If  you
       don't specify input, input is from Standard Input.

       Output is always to Standard Output.

       This program handles multi-image PPM input, producing multi-image PPM output.

       --pal  Use the PAL transform instead of the default NTSC.

	      Print a grand total of the number of illegal pixels.

	      Produce  a humongous listing of illegal colors and their legal counterparts.  NOTE:
	      This option may produce a great deal of output.

	      Output only pixels that are already legal.  Output black in place  of  pixels  that
	      are not.

	      Output only pixels that are illegal (and output them uncorrected).  Output black in
	      place of pixels that are already legal.

	      Output only pixels that are corrected versions of illegal pixels.  Output black  in
	      place of pixels that are already legal.

       pamdepth(1) , ppmdim(1) , ppmbrighten(1) , ppm(1)

       Wes Barris, Minnesota Supercomputer Center, Inc., Bryan Henderson

netpbm documentation			  April 19, 2000		   Ppmntsc User Manual(0)
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