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<title>RGB2YCBCR</title>
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<h1 align=center>RGB2YCBCR</h1>
<a href="#NAME">NAME</a><br>
<a href="#SYNOPSIS">SYNOPSIS</a><br>
<a href="#DESCRIPTION">DESCRIPTION</a><br>
<a href="#OPTIONS">OPTIONS</a><br>
<a href="#SEE ALSO">SEE ALSO</a><br>
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<a name="NAME"></a>
<h2>NAME</h2>
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<p>rgb2ycbcr − convert non-YCbCr <small>TIFF</small>
images to a YCbCr <small>TIFF</small> image</p>
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<a name="SYNOPSIS"></a>
<h2>SYNOPSIS</h2>
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<p><b>rgb2ycbcr</b> [ <i>options</i> ] <i>src1.tif src2.tif
... dst.tif</i></p>
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<h2>DESCRIPTION</h2>
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<p><i>rgb2ycbcr</i> converts <small>RGB</small> color,
greyscale, or bi-level <small>TIFF</small> images to YCbCr
images by transforming and sampling pixel data. If multiple
files are specified on the command line each source file is
converted to a separate directory in the destination
file.</p>
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<p>By default, chrominance samples are created by sampling 2
by 2 blocks of luminance values; this can be changed with
the <b>−h</b> and <b>−v</b> options. Output data
are compressed with the <small>PackBits</small> compression
scheme, by default; an alternate scheme can be selected with
the <b>−c</b> option. By default, output data are
compressed in strips with the number of rows in each strip
selected so that the size of a strip is never more than 8
kilobytes; the <b>−r</b> option can be used to
explicitly set the number of rows per strip.</p>
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<a name="OPTIONS"></a>
<h2>OPTIONS</h2>
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<p><b>−c</b></p>
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<p>Specify a compression scheme to use when writing image
data: <b>−c none</b> for no compression, <b>-c
packbits</b> for the PackBits compression algorithm (the
default), <b>-c jpeg</b> for the JPEG compression algorithm,
<b>-c zip</b> for the deflate compression algorithm, and
<b>−c lzw</b> for Lempel-Ziv & Welch.</p>
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<p><b>−h</b></p>
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<p>Set the horizontal sampling dimension to one of: 1, 2
(default), or 4.</p>
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<p><b>−r</b></p>
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<p>Write data with a specified number of rows per strip; by
default the number of rows/strip is selected so that each
strip is approximately 8 kilobytes.</p>
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<p><b>−v</b></p>
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<p>Set the vertical sampling dimension to one of: 1, 2
(default), or 4.</p>
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<a name="SEE ALSO"></a>
<h2>SEE ALSO</h2>
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<p><b>tiffinfo</b>(1), <b>tiffcp</b>(1),
<b>libtiff</b>(3)</p>
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<p>Libtiff library home page:
<b>http://www.remotesensing.org/libtiff</b></p>
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