src/tiff/html/man/tiff2rgba.1.html

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   7 <title>TIFF2RGBA</title>
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  10
  11 <h1 align=center>TIFF2RGBA</h1>
  12 <a href="#NAME">NAME</a><br>
  13 <a href="#SYNOPSIS">SYNOPSIS</a><br>
  14 <a href="#DESCRIPTION">DESCRIPTION</a><br>
  15 <a href="#OPTIONS">OPTIONS</a><br>
  16 <a href="#SEE ALSO">SEE ALSO</a><br>
  17
  18 <hr>
  19 <a name="NAME"></a>
  20 <h2>NAME</h2>
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  27 <p>tiff2rgba &minus; convert a <small>TIFF</small> image to
  28 RGBA color space</p>
  29 </td>
  30 </table>
  31 <a name="SYNOPSIS"></a>
  32 <h2>SYNOPSIS</h2>
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  39 <p><b>tiff2rgba</b> [ <i>options</i> ] <i>input.tif
  40 output.tif</i></p>
  41 </td>
  42 </table>
  43 <a name="DESCRIPTION"></a>
  44 <h2>DESCRIPTION</h2>
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  51 <p><i>Tiff2rgba</i> converts a wide variety of TIFF images
  52 into an RGBA TIFF image. This includes the ability to
  53 translate different color spaces and photometric
  54 interpretation into RGBA, support for alpha blending, and
  55 translation of many different bit depths into a 32bit RGBA
  56 image.</p>
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  58 <p>Internally this program is implemented using the
  59 <i>TIFFReadRGBAImage()</i> function, and it suffers any
  60 limitations of that image. This includes limited support for
  61 &gt; 8 BitsPerSample images, and flaws with some esoteric
  62 combinations of BitsPerSample, photometric interpretation,
  63 block organization and planar configuration.</p>
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  65 <p>The generated images are stripped images with four
  66 samples per pixel (red, green, blue and alpha) or if the
  67 <b>&minus;n</b> flag is used, three samples per pixel (red,
  68 green, and blue). The resulting images are always planar
  69 configuration contiguous. For this reason, this program is a
  70 useful utility for transform exotic TIFF files into a form
  71 ingestible by almost any TIFF supporting software.</p>
  72 </td>
  73 </table>
  74 <a name="OPTIONS"></a>
  75 <h2>OPTIONS</h2>
  76 <!-- TABS -->
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  82
  83 <p><b>&minus;c</b></p>
  84 </td>
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  86 <td width="80%">
  87
  88 <p>Specify a compression scheme to use when writing image
  89 data: <b>&minus;c none</b> for no compression (the default),
  90 <b>&minus;c packbits</b> for the PackBits compression
  91 algorithm, <b>&minus;c zip</b> for the Deflate compression
  92 algorithm, <b>&minus;c jpeg</b> for the JPEG compression
  93 algorithm, and <b>&minus;c lzw</b> for Lempel-Ziv &amp;
  94 Welch.</p>
  95 </td>
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  97 </td>
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 101
 102 <p><b>&minus;r</b></p>
 103 </td>
 104 <td width="5%"></td>
 105 <td width="80%">
 106
 107 <p>Write data with a specified number of rows per strip; by
 108 default the number of rows/strip is selected so that each
 109 strip is approximately 8 kilobytes.</p>
 110 </td>
 111 <td width="0%">
 112 </td>
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 115 <td width="2%">
 116
 117 <p><b>&minus;b</b></p>
 118 </td>
 119 <td width="5%"></td>
 120 <td width="80%">
 121
 122 <p>Process the image one block (strip/tile) at a time
 123 instead of by reading the whole image into memory at once.
 124 This may be necessary for very large images on systems with
 125 limited RAM.</p>
 126 </td>
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 128 </td>
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 132
 133 <p><b>&minus;n</b></p>
 134 </td>
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 136 <td width="80%">
 137
 138 <p>Drop the alpha component from the output file, producing
 139 a pure RGB file. Currently this does not work if the
 140 <b>&minus;b</b> flag is also in effect.</p>
 141 </td>
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 143 </td>
 144 </table>
 145 <a name="SEE ALSO"></a>
 146 <h2>SEE ALSO</h2>
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 153 <p><b>tiff2bw</b>(1), <b>TIFFReadRGBAImage</b>(3t),
 154 <b>libtiff</b>(3)</p>
 155 <!-- INDENTATION -->
 156 <p>Libtiff library home page:
 157 <b>http://www.remotesensing.org/libtiff/</b></p>
 158 </td>
 159 </table>
 160 <hr>
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