| 1 | <!-- Creator : groff version 1.18.1 -->
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| 2 | <!-- CreationDate: Fri Jul 13 17:43:19 2007 -->
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| 3 | <html>
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| 4 | <head>
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| 5 | <meta name="generator" content="groff -Thtml, see www.gnu.org">
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| 6 | <meta name="Content-Style" content="text/css">
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| 7 | <title>RGB2YCBCR</title>
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| 8 | </head>
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| 9 | <body>
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| 10 |
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| 11 | <h1 align=center>RGB2YCBCR</h1>
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| 12 | <a href="#NAME">NAME</a><br>
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| 13 | <a href="#SYNOPSIS">SYNOPSIS</a><br>
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| 14 | <a href="#DESCRIPTION">DESCRIPTION</a><br>
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| 15 | <a href="#OPTIONS">OPTIONS</a><br>
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| 16 | <a href="#SEE ALSO">SEE ALSO</a><br>
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| 17 |
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| 18 | <hr>
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| 19 | <a name="NAME"></a>
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| 20 | <h2>NAME</h2>
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| 21 | <!-- INDENTATION -->
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| 22 | <table width="100%" border=0 rules="none" frame="void"
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| 23 | cols="2" cellspacing="0" cellpadding="0">
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| 24 | <tr valign="top" align="left">
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| 25 | <td width="8%"></td>
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| 26 | <td width="91%">
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| 27 | <p>rgb2ycbcr − convert non-YCbCr <small>TIFF</small>
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| 28 | images to a YCbCr <small>TIFF</small> image</p>
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| 29 | </td>
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| 30 | </table>
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| 31 | <a name="SYNOPSIS"></a>
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| 32 | <h2>SYNOPSIS</h2>
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| 33 | <!-- INDENTATION -->
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| 34 | <table width="100%" border=0 rules="none" frame="void"
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| 35 | cols="2" cellspacing="0" cellpadding="0">
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| 36 | <tr valign="top" align="left">
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| 37 | <td width="8%"></td>
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| 38 | <td width="91%">
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| 39 | <p><b>rgb2ycbcr</b> [ <i>options</i> ] <i>src1.tif src2.tif
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| 40 | ... dst.tif</i></p>
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| 41 | </td>
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| 42 | </table>
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| 43 | <a name="DESCRIPTION"></a>
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| 44 | <h2>DESCRIPTION</h2>
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| 45 | <!-- INDENTATION -->
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| 46 | <table width="100%" border=0 rules="none" frame="void"
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| 47 | cols="2" cellspacing="0" cellpadding="0">
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| 48 | <tr valign="top" align="left">
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| 49 | <td width="8%"></td>
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| 50 | <td width="91%">
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| 51 | <p><i>rgb2ycbcr</i> converts <small>RGB</small> color,
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| 52 | greyscale, or bi-level <small>TIFF</small> images to YCbCr
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| 53 | images by transforming and sampling pixel data. If multiple
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| 54 | files are specified on the command line each source file is
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| 55 | converted to a separate directory in the destination
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| 56 | file.</p>
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| 57 | <!-- INDENTATION -->
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| 58 | <p>By default, chrominance samples are created by sampling 2
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| 59 | by 2 blocks of luminance values; this can be changed with
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| 60 | the <b>−h</b> and <b>−v</b> options. Output data
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| 61 | are compressed with the <small>PackBits</small> compression
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| 62 | scheme, by default; an alternate scheme can be selected with
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| 63 | the <b>−c</b> option. By default, output data are
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| 64 | compressed in strips with the number of rows in each strip
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| 65 | selected so that the size of a strip is never more than 8
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| 66 | kilobytes; the <b>−r</b> option can be used to
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| 67 | explicitly set the number of rows per strip.</p>
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| 68 | </td>
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| 69 | </table>
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| 70 | <a name="OPTIONS"></a>
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| 71 | <h2>OPTIONS</h2>
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| 72 | <!-- TABS -->
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| 73 | <table width="100%" border=0 rules="none" frame="void"
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| 74 | cols="5" cellspacing="0" cellpadding="0">
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| 75 | <tr valign="top" align="left">
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| 76 | <td width="10%"></td>
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| 77 | <td width="3%">
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| 78 |
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| 79 | <p><b>−c</b></p>
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| 80 | </td>
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| 81 | <td width="5%"></td>
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| 82 | <td width="80%">
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| 83 |
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| 84 | <p>Specify a compression scheme to use when writing image
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| 85 | data: <b>−c none</b> for no compression, <b>−c
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| 86 | packbits</b> for the PackBits compression algorithm (the
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| 87 | default), <b>−c jpeg</b> for the JPEG compression
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| 88 | algorithm, <b>−c zip</b> for the deflate compression
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| 89 | algorithm, and <b>−c lzw</b> for Lempel-Ziv &
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| 90 | Welch.</p>
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| 91 | </td>
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| 92 | <td width="0%">
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| 93 | </td>
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| 94 | <tr valign="top" align="left">
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| 95 | <td width="10%"></td>
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| 96 | <td width="3%">
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| 97 |
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| 98 | <p><b>−h</b></p>
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| 99 | </td>
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| 100 | <td width="5%"></td>
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| 101 | <td width="80%">
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| 102 |
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| 103 | <p>Set the horizontal sampling dimension to one of: 1, 2
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| 104 | (default), or 4.</p>
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| 105 | </td>
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| 106 | <td width="0%">
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| 107 | </td>
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| 108 | <tr valign="top" align="left">
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| 109 | <td width="10%"></td>
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| 110 | <td width="3%">
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| 111 |
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| 112 | <p><b>−r</b></p>
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| 113 | </td>
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| 114 | <td width="5%"></td>
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| 115 | <td width="80%">
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| 116 |
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| 117 | <p>Write data with a specified number of rows per strip; by
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| 118 | default the number of rows/strip is selected so that each
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| 119 | strip is approximately 8 kilobytes.</p>
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| 120 | </td>
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| 121 | <td width="0%">
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| 122 | </td>
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| 123 | <tr valign="top" align="left">
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| 124 | <td width="10%"></td>
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| 125 | <td width="3%">
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| 126 |
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| 127 | <p><b>−v</b></p>
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| 128 | </td>
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| 129 | <td width="5%"></td>
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| 130 | <td width="80%">
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| 131 |
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| 132 | <p>Set the vertical sampling dimension to one of: 1, 2
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| 133 | (default), or 4.</p>
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| 134 | </td>
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| 135 | <td width="0%">
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| 136 | </td>
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| 137 | </table>
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| 138 | <a name="SEE ALSO"></a>
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| 139 | <h2>SEE ALSO</h2>
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| 140 | <!-- INDENTATION -->
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| 141 | <table width="100%" border=0 rules="none" frame="void"
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| 142 | cols="2" cellspacing="0" cellpadding="0">
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| 143 | <tr valign="top" align="left">
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| 144 | <td width="8%"></td>
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| 145 | <td width="91%">
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| 146 | <p><b>tiffinfo</b>(1), <b>tiffcp</b>(1),
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| 147 | <b>libtiff</b>(3)</p>
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| 148 | <!-- INDENTATION -->
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| 149 | <p>Libtiff library home page:
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| 150 | <b>http://www.remotesensing.org/libtiff</b></p>
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| 151 | </td>
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| 152 | </table>
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| 153 | <hr>
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| 154 | </body>
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| 155 | </html>
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