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<!-- CreationDate: Mon Jan 2 17:41:56 2006 -->
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<title>TIFF2RGBA</title>
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</head>
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<body>
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<h1 align=center>TIFF2RGBA</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="#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">tiff2rgba
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− convert a <small>TIFF</small> image to RGBA color
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space</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>tiff2rgba</b>
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[ options ] <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>Tiff2rgba</i>
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converts a wide variety of TIFF images into an RGBA TIFF
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image. This includes the ability to translate different
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color spaces and photometric interpretation into RGBA,
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support for alpha blending, and translation of many
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different bit depths into a 32bit RGBA image.</p>
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<p style="margin-left:11%; margin-top: 1em">Internally this
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program is implemented using the <i>TIFFReadRGBAImage()</i>
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function, and it suffers any limitations of that image. This
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includes limited support for > 8 BitsPerSample images,
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and flaws with some esoteric combinations of BitsPerSample,
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photometric interpretation, block organization and planar
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configuration.</p>
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<p style="margin-left:11%; margin-top: 1em">The generated
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images are stripped images with four samples per pixel (red,
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green, blue and alpha) or if the -n flag is used, three
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samples per pixel (red, green, and blue). The resulting
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images are always planar configuration contiguous. For this
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reason, this program is a useful utility for transform
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exotic TIFF files into a form ingestible by almost any TIFF
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supporting software.</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 a
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compression scheme to use when writing image data:
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<b>−c none</b> for no compression (the default), <b>-c
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packbits</b> for the PackBits compression algorithm, <b>-c
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zip</b> for the Deflate compression algorithm, <b>-c
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jpeg</b> for the JPEG compression algorithm, and <b>−c
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lzw</b> for Lempel-Ziv & Welch.</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">Write data with a
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specified number of rows per strip; by default the number of
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rows/strip is selected so that each strip is approximately 8
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kilobytes.</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>−b</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">Process the image
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one block (strip/tile) at a time instead of by reading the
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whole image into memory at once. This may be necessary for
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very large images on systems with limited RAM.</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>−n</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">Drop the alpha
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component from the output file, producing a pure RGB file.
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Currently this does not work if the -b flag is also in
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effect.</p> </td>
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</table>
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2002-10-07 09:47:36 -04:00
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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>tiff2bw</b>(1),
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<b>TIFFReadRGBAImage</b>(3t), <b>libtiff</b>(3)</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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</html>
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