[--pal] [--legalonly] [--illegalonly] [--correctedonly] [--verbose]
Minimum unique abbreviations of options are acceptable.
This program is part of Netpbm.
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 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)
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 out-
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
Output is always to Standard Output.
This program handles multi-image PPM input, producing multi-image PPM
--pal Use the PAL transform instead of the default NTSC.
pamdepth, ppmdim, ppmbrighten, ppm
Wes Barris, Minnesota Supercomputer Center, Inc., Bryan Henderson
netpbm documentation April 19, 2000 Ppmntsc User Manual(0)