How to substitute "\" by "\/" using SED? Post: 302263171

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ppmntsc

PPMNTSC(1)						      General Commands Manual							PPMNTSC(1)

NAME

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

SYNOPSIS

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

       Minimum unique abbreviations of options are acceptable.

DESCRIPTION

       This  program  makes  colors  legal in the NTSC (or PAL) color systems.	Often, images generated on the computer are made for use in movies
       which ultimately end up on video tape.  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) systems.  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 output.

       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.

OPTIONS

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

       --verbose
	      Print a grand total of the number of illegal pixels.

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

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

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

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

SEE ALSO

       ppm(5), ppmdepth(1), ppmdim(1), ppmbrighten(1)

AUTHOR

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

4th Berkeley Distribution					  April 19, 2000							PPMNTSC(1)