126 lines
2.5 KiB
HTML
126 lines
2.5 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
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<HTML><HEAD><TITLE>Manpage of TIFF2BW</TITLE>
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</HEAD><BODY BGCOLOR=WHITE><FONT FACE="helvetica, sans, arial">
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<H1>TIFF2BW</H1>
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Section: User Commands (1)<BR>Updated: October 15, 1995<BR><A HREF="#index">Index</A>
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<BR><A HREF="index.html">Return to Main Contents</A>
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<HR>
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<A NAME="lbAB"> </A>
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<H2>NAME</H2>
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tiff2bw - convert a color
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<FONT SIZE="-1">TIFF</FONT>
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image to greyscale
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<A NAME="lbAC"> </A>
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<H2>SYNOPSIS</H2>
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<B>tiff2bw</B>
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[
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options
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]
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<I>input.tif</I>
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<I>output.tif</I>
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<A NAME="lbAD"> </A>
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<H2>DESCRIPTION</H2>
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<I>Tiff2bw</I>
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converts an
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<FONT SIZE="-1">RGB</FONT>
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or Palette color
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<FONT SIZE="-1">TIFF</FONT>
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image to a greyscale image by
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combining percentages of the red, green, and blue channels.
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By default, output samples are created by taking
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28% of the red channel, 59% of the green channel, and 11% of
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the blue channel.
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To alter these percentages, the
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<B>-R</B>,
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<B>-G</B>,
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and
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<B>-B</B>
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options may be used.
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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><B>-c</B>
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<DD>
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Specify a compression scheme to use when writing image data:
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<B>-c none</B>
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for no compression,
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<B>-c packbits</B>
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for the PackBits compression algorithm,
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<B>-c zip</B>
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for the Deflate compression algorithm,
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<B>-c g3</B>
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for the CCITT Group 3 compression algorithm,
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<B>-c g4</B>
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for the CCITT Group 4 compression algorithm,
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and
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<B>-c lzw</B>
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for Lempel-Ziv & Welch (the default).
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<DT><B>-r</B>
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<DD>
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Write data with a specified number of rows per strip;
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by default the number of rows/strip is selected so that each strip
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is approximately 8 kilobytes.
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<DT><B>-R</B>
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<DD>
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Specify the percentage of the red channel to use (default 28).
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<DT><B>-G</B>
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<DD>
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Specify the percentage of the green channel to use (default 59).
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<DT><B>-B</B>
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<DD>
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Specify the percentage of the blue channel to use (default 11).
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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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<I><A HREF="pal2rgb+1.html">pal2rgb</A></I>(1),
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<I><A HREF="tiffinfo+1.html">tiffinfo</A></I>(1),
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<I><A HREF="tiffcp+1.html">tiffcp</A></I>(1),
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<I><A HREF="tiffmedian+1.html">tiffmedian</A></I>(1),
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<I><A HREF="libtiff+3">libtiff</A></I>(3)
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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><A HREF="#lbAB">NAME</A><DD>
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<DT><A HREF="#lbAC">SYNOPSIS</A><DD>
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<DT><A HREF="#lbAD">DESCRIPTION</A><DD>
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<DT><A HREF="#lbAE">OPTIONS</A><DD>
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<DT><A HREF="#lbAF">SEE ALSO</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="index.html">man2html</A>,
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using the manual pages.<BR>
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Time: 01:31:47 GMT, November 23, 1999
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</BODY>
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</HTML>
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