| author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
| Tue, 06 Jul 2010 15:10:48 +0300 | |
| changeset 30 | 5dc02b23752f |
| parent 0 | 1918ee327afb |
| permissions | -rw-r--r-- |
| 0 | 1 |
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<meta name="generator" content="groff -Thtml, see www.gnu.org"> |
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<title>RGB2YCBCR</title> |
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<h1 align=center>RGB2YCBCR</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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<a name="NAME"></a> |
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<h2>NAME</h2> |
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<p>rgb2ycbcr − convert non-YCbCr <small>TIFF</small> |
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images to a YCbCr <small>TIFF</small> image</p> |
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</td> |
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</table> |
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<a name="SYNOPSIS"></a> |
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<h2>SYNOPSIS</h2> |
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<p><b>rgb2ycbcr</b> [ <i>options</i> ] <i>src1.tif src2.tif |
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... dst.tif</i></p> |
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<a name="DESCRIPTION"></a> |
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<h2>DESCRIPTION</h2> |
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<td width="91%"> |
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<p><i>rgb2ycbcr</i> converts <small>RGB</small> color, |
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greyscale, or bi-level <small>TIFF</small> images to YCbCr |
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images by transforming and sampling pixel data. If multiple |
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files are specified on the command line each source file is |
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converted to a separate directory in the destination |
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file.</p> |
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<p>By default, chrominance samples are created by sampling 2 |
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by 2 blocks of luminance values; this can be changed with |
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the <b>−h</b> and <b>−v</b> options. Output data |
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are compressed with the <small>PackBits</small> compression |
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scheme, by default; an alternate scheme can be selected with |
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the <b>−c</b> option. By default, output data are |
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compressed in strips with the number of rows in each strip |
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selected so that the size of a strip is never more than 8 |
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kilobytes; the <b>−r</b> option can be used to |
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explicitly set the number of rows per strip.</p> |
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</td> |
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</table> |
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<a name="OPTIONS"></a> |
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<h2>OPTIONS</h2> |
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cols="5" cellspacing="0" cellpadding="0"> |
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<p><b>−c</b></p> |
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</td> |
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<td width="5%"></td> |
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<td width="80%"> |
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<p>Specify a compression scheme to use when writing image |
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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data: <b>−c none</b> for no compression, <b>−c |
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packbits</b> for the PackBits compression algorithm (the |
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
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default), <b>−c jpeg</b> for the JPEG compression |
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Revision: 201025
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parents:
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algorithm, <b>−c zip</b> for the deflate compression |
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Revision: 201025
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
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diff
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algorithm, and <b>−c lzw</b> for Lempel-Ziv & |
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Revision: 201025
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
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diff
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Welch.</p> |
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</td> |
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<td width="10%"></td> |
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<td width="3%"> |
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<p><b>−h</b></p> |
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</td> |
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<td width="5%"></td> |
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<td width="80%"> |
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<p>Set the horizontal sampling dimension to one of: 1, 2 |
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(default), or 4.</p> |
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<td width="10%"></td> |
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<p><b>−r</b></p> |
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</td> |
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<td width="5%"></td> |
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<td width="80%"> |
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<p>Write data with a specified number of rows per strip; by |
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default the number of rows/strip is selected so that each |
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strip is approximately 8 kilobytes.</p> |
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</td> |
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<td width="0%"> |
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</td> |
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<tr valign="top" align="left"> |
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<td width="10%"></td> |
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<td width="3%"> |
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<p><b>−v</b></p> |
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</td> |
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<td width="5%"></td> |
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<td width="80%"> |
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<p>Set the vertical sampling dimension to one of: 1, 2 |
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(default), or 4.</p> |
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</td> |
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<td width="0%"> |
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</td> |
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</table> |
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<a name="SEE ALSO"></a> |
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<h2>SEE ALSO</h2> |
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<td width="91%"> |
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<p><b>tiffinfo</b>(1), <b>tiffcp</b>(1), |
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<b>libtiff</b>(3)</p> |
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<p>Libtiff library home page: |
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<b>http://www.remotesensing.org/libtiff</b></p> |
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</td> |
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</table> |
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<hr> |
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</body> |
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</html> |