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PPMNTSC
!!!PPMNTSC
NAME
SYNOPSIS
DESCRIPTION
OPTIONS
SEE ALSO
AUTHOR
----
!!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


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
----

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Last edited on Tuesday, June 4, 2002 12:22:46 am by "perry"

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