150 lines
3.5 KiB
HTML
150 lines
3.5 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<HTML><HEAD><TITLE>Man page of PPMNTSC</TITLE>
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</HEAD><BODY>
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<H1>PPMNTSC</H1>
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Section: User Commands (1)<BR>Updated: April 19, 2000<BR><A HREF="#index">Index</A>
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<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
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<A NAME="lbAB"> </A>
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<H2>NAME</H2>
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ppmntsc - make a portable pixmap look like taken from an American TV
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<A NAME="lbAC"> </A>
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<H2>SYNOPSIS</H2>
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<B>ppmntsc</B>
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[
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<B>--pal</B>
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] [
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<B>--legalonly</B>
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] [
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<B>--illegalonly</B>
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] [
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<B>--correctedonly</B>
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] [
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<B>--verbose</B>
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] [
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<B>--debug</B>
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] [
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<I>infile</I>
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]
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<P>
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Minimum unique abbreviations of options are acceptable.
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<P>
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<A NAME="lbAD"> </A>
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<H2>DESCRIPTION</H2>
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This program makes colors legal in the NTSC (or PAL) color systems.
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Often, images generated on the computer are made for use in movies
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which ultimately end up on video tape. However, the range of colors
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(as specified by their RGB values) on a computer does not match the
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range of colors that can be represented using the NTSC (or PAL) systems.
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If an image with "illegal" colors is sent directly to an NTSC (or PAL)
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video system for recording, the "illegal" colors will be clipped. This
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may result in an undesirable looking picture.
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<P>
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This utility tests each pixel in an image to see if it falls within
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the legal NTSC (or PAL) range. If not, it raises or lowers the
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pixel's saturation in the output so that it does fall within legal
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limits. Pixels that are already OK just go unmodified into the
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output.
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<P>
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Input is from the file named
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<I>input</I>.
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If
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<I>input </I>
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is
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<B>-</B>,
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input is from Standard Input.
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If you don't specify
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<I>input</I>,
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input is from Standard Input.
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<P>
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Output is always to Standard Output.
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<P>
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This program handles multi-image PPM input, producing multi-image PPM
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output.
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<P>
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<A NAME="lbAE"> </A>
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<H2>OPTIONS</H2>
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<DL COMPACT>
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<DT id="1"><B>--pal</B>
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<DD>
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Use the PAL transform instead of the default NTSC.
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<DT id="2"><B>--verbose</B>
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<DD>
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Print a grand total of the number of illegal pixels.
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<DT id="3"><B>--debug</B>
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<DD>
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Produce a humongous listing of illegal colors and their legal counterparts.
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NOTE: This option may produce a great deal of output.
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<DT id="4"><B>--legalonly</B>
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<DD>
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Output only pixels that are already legal. Output black in place of pixels
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that are not.
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<DT id="5"><B>--illegalonly</B>
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<DD>
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Output only pixels that are illegal (and output them uncorrected).
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Output black in place of pixels that are already legal.
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<DT id="6"><B>--correctedonly</B>
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<DD>
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Output only pixels that are corrected versions of illegal pixels. Output
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black in place of pixels that are already legal.
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<P>
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</DL>
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<A NAME="lbAF"> </A>
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<H2>SEE ALSO</H2>
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<B><A HREF="/cgi-bin/man/man2html?5+ppm">ppm</A></B>(5),
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<B><A HREF="/cgi-bin/man/man2html?1+ppmdepth">ppmdepth</A></B>(1),
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<B><A HREF="/cgi-bin/man/man2html?1+ppmdim">ppmdim</A></B>(1),
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<B><A HREF="/cgi-bin/man/man2html?1+ppmbrighten">ppmbrighten</A></B>(1)
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<A NAME="lbAG"> </A>
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<H2>AUTHOR</H2>
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Wes Barris, Minnesota Supercomputer Center, Inc., Bryan Henderson
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<P>
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<HR>
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<A NAME="index"> </A><H2>Index</H2>
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<DL>
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<DT id="7"><A HREF="#lbAB">NAME</A><DD>
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<DT id="8"><A HREF="#lbAC">SYNOPSIS</A><DD>
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<DT id="9"><A HREF="#lbAD">DESCRIPTION</A><DD>
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<DT id="10"><A HREF="#lbAE">OPTIONS</A><DD>
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<DT id="11"><A HREF="#lbAF">SEE ALSO</A><DD>
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<DT id="12"><A HREF="#lbAG">AUTHOR</A><DD>
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</DL>
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<HR>
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This document was created by
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<A HREF="/cgi-bin/man/man2html">man2html</A>,
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using the manual pages.<BR>
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Time: 00:05:24 GMT, March 31, 2021
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