c3402403ea
be used if build directory is not the same as source directory.
* man/{TIFFGetField.3tiff, man/TIFFSetField.3tiff}: Documented
TIFFTAG_PHOTOSHOP, TIFFTAG_RICHTIFFIPTC, and TIFFTAG_XMLPACKET,
and re-sorted tag names in alphabetical order.
175 lines
4.6 KiB
HTML
175 lines
4.6 KiB
HTML
<!-- Creator : groff version 1.19.2 -->
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<!-- CreationDate: Mon Jan 2 17:41:59 2006 -->
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
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"http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta name="generator" content="groff -Thtml, see www.gnu.org">
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<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
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<meta name="Content-Style" content="text/css">
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<style type="text/css">
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p { margin-top: 0; margin-bottom: 0; }
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pre { margin-top: 0; margin-bottom: 0; }
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table { margin-top: 0; margin-bottom: 0; }
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</style>
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<title>TIFFMEDIAN</title>
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</head>
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<body>
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<h1 align=center>TIFFMEDIAN</h1>
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<a href="#NAME">NAME</a><br>
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<a href="#SYNOPSIS">SYNOPSIS</a><br>
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<a href="#DESCRIPTION">DESCRIPTION</a><br>
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<a href="#OPTIONS">OPTIONS</a><br>
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<a href="#NOTES">NOTES</a><br>
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<a href="#SEE ALSO">SEE ALSO</a><br>
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<hr>
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<a name="NAME"></a>
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<h2>NAME</h2>
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<p style="margin-left:11%; margin-top: 1em">tiffmedian
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− apply the median cut algorithm to data in a
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<small>TIFF</small> file</p>
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<a name="SYNOPSIS"></a>
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<h2>SYNOPSIS</h2>
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<p style="margin-left:11%; margin-top: 1em"><b>tiffmedian</b>
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[ <i>options</i> ] <i>input.tif output.tif</i></p>
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<a name="DESCRIPTION"></a>
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<h2>DESCRIPTION</h2>
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<p style="margin-left:11%; margin-top: 1em"><i>tiffmedian</i>
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applies the median cut algorithm to an <small>RGB</small>
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image in <i>input.tif</i> to generate a palette image that
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is written to <i>output.tif</i>. The generated colormap has,
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by default, 256 entries. The image data is quantized by
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mapping each pixel to the closest color values in the
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colormap.</p>
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<a name="OPTIONS"></a>
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<h2>OPTIONS</h2>
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<table width="100%" border=0 rules="none" frame="void"
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cellspacing="0" cellpadding="0">
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<tr valign="top" align="left">
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<td width="11%"></td>
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<td width="3%">
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<p style="margin-top: 1em" valign="top"><b>−c</b></p> </td>
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<td width="8%"></td>
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<td width="78%">
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<p style="margin-top: 1em" valign="top">Specify the
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compression to use for data written to the output file:
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<b>none</b> for no compression, <b>packbits</b> for PackBits
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compression, <b>lzw</b> for Lempel-Ziv & Welch
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compression, and <b>zip</b> for Deflate compression. By
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default <i>tiffmedian</i> will compress data according to
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the value of the <i>Compression</i> tag found in the source
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file.</p> </td>
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</table>
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<p style="margin-left:22%; margin-top: 1em"><small>LZW</small>
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compression can be specified together with a
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<i>predictor</i> value. A predictor value of 2 causes each
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scanline of the output image to undergo horizontal
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differencing before it is encoded; a value of 1 forces each
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scanline to be encoded without differencing. LZW-specific
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options are specified by appending a
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‘‘:’’-separated list to the
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‘‘lzw’’ option; e.g. <b>−c
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lzw:2</b> for <small>LZW</small> compression with horizontal
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differencing.</p>
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<table width="100%" border=0 rules="none" frame="void"
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cellspacing="0" cellpadding="0">
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<tr valign="top" align="left">
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<td width="11%"></td>
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<td width="3%">
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<p style="margin-top: 1em" valign="top"><b>−C</b></p> </td>
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<td width="8%"></td>
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<td width="78%">
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<p style="margin-top: 1em" valign="top">Specify the number
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of entries to use in the generated colormap. By default all
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256 entries/colors are used.</p></td>
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<tr valign="top" align="left">
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<td width="11%"></td>
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<td width="3%">
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<p style="margin-top: 1em" valign="top"><b>−f</b></p> </td>
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<td width="8%"></td>
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<td width="78%">
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<p style="margin-top: 1em" valign="top">Apply
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Floyd-Steinberg dithering before selecting a colormap
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entry.</p> </td>
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<tr valign="top" align="left">
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<td width="11%"></td>
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<td width="3%">
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<p style="margin-top: 1em" valign="top"><b>−r</b></p> </td>
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<td width="8%"></td>
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<td width="78%">
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<p style="margin-top: 1em" valign="top">Specify the number
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of rows (scanlines) in each strip of data written to the
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output file. By default, <i>tiffmedian</i> attempts to set
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the rows/strip that no more than 8 kilobytes of data appear
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in a strip.</p></td>
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</table>
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<a name="NOTES"></a>
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<h2>NOTES</h2>
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<p style="margin-left:11%; margin-top: 1em">This program is
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derived from Paul Heckbert’s <i>median</i>
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program.</p>
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<a name="SEE ALSO"></a>
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<h2>SEE ALSO</h2>
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<p style="margin-left:11%; margin-top: 1em"><b>pal2rgb</b>(1),
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<b>tiffinfo</b>(1), <b>tiffcp</b>(1), <b>tiffcmp</b>(1),
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<b>libtiff</b>(3TIFF)</p>
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<p style="margin-left:11%; margin-top: 1em"><b>Color Image
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Quantization for Frame Buffer Display</b>, Paul Heckbert,
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SIGGRAPH proceedings, 1982, pp. 297-307.</p>
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<p style="margin-left:11%; margin-top: 1em">Libtiff library
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home page: <b>http://www.remotesensing.org/libtiff/</b></p>
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<hr>
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</body>
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</html>
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