152 lines
4.1 KiB
HTML
152 lines
4.1 KiB
HTML
<html>
|
|
<head>
|
|
<meta name="generator" content="groff -Thtml, see www.gnu.org">
|
|
<meta name="Content-Style" content="text/css">
|
|
<title>RGB2YCBCR</title>
|
|
</head>
|
|
<body>
|
|
|
|
<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>
|
|
|
|
<hr>
|
|
<!-- Creator : groff version 1.18 -->
|
|
<!-- CreationDate: Mon Oct 7 17:36:35 2002 -->
|
|
<a name="NAME"></a>
|
|
<h2>NAME</h2>
|
|
<!-- INDENTATION -->
|
|
<p><table width="100%" border=0 rules="none" frame="void"
|
|
cols="2" cellspacing="0" cellpadding="0">
|
|
<tr valign="top" align="left">
|
|
<td width="8%"></td>
|
|
<td width="91%">
|
|
<p>rgb2ycbcr − convert non-YCbCr <small>TIFF</small>
|
|
images to a YCbCr <small>TIFF</small> image</p>
|
|
</td>
|
|
</table></p>
|
|
<a name="SYNOPSIS"></a>
|
|
<h2>SYNOPSIS</h2>
|
|
<!-- INDENTATION -->
|
|
<p><table width="100%" border=0 rules="none" frame="void"
|
|
cols="2" cellspacing="0" cellpadding="0">
|
|
<tr valign="top" align="left">
|
|
<td width="8%"></td>
|
|
<td width="91%">
|
|
<p><b>rgb2ycbcr</b> [ <i>options</i> ] <i>src1.tif src2.tif
|
|
... dst.tif</i></p>
|
|
</td>
|
|
</table></p>
|
|
<a name="DESCRIPTION"></a>
|
|
<h2>DESCRIPTION</h2>
|
|
<!-- INDENTATION -->
|
|
<p><table width="100%" border=0 rules="none" frame="void"
|
|
cols="2" cellspacing="0" cellpadding="0">
|
|
<tr valign="top" align="left">
|
|
<td width="8%"></td>
|
|
<td width="91%">
|
|
<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>
|
|
<!-- INDENTATION -->
|
|
<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>
|
|
</td>
|
|
</table></p>
|
|
<a name="OPTIONS"></a>
|
|
<h2>OPTIONS</h2>
|
|
<!-- TABS -->
|
|
<p><table width="100%" border=0 rules="none" frame="void"
|
|
cols="5" cellspacing="0" cellpadding="0">
|
|
<tr valign="top" align="left">
|
|
<td width="10%"></td>
|
|
<td width="3%">
|
|
|
|
<p><b>−c</b></p>
|
|
</td>
|
|
<td width="5%"></td>
|
|
<td width="80%">
|
|
|
|
<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>
|
|
</td>
|
|
<td width="0%">
|
|
</td>
|
|
<tr valign="top" align="left">
|
|
<td width="10%"></td>
|
|
<td width="3%">
|
|
|
|
<p><b>−h</b></p>
|
|
</td>
|
|
<td width="5%"></td>
|
|
<td width="80%">
|
|
|
|
<p>Set the horizontal sampling dimension to one of: 1, 2
|
|
(default), or 4.</p>
|
|
</td>
|
|
<td width="0%">
|
|
</td>
|
|
<tr valign="top" align="left">
|
|
<td width="10%"></td>
|
|
<td width="3%">
|
|
|
|
<p><b>−r</b></p>
|
|
</td>
|
|
<td width="5%"></td>
|
|
<td width="80%">
|
|
|
|
<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>
|
|
</td>
|
|
<td width="0%">
|
|
</td>
|
|
<tr valign="top" align="left">
|
|
<td width="10%"></td>
|
|
<td width="3%">
|
|
|
|
<p><b>−v</b></p>
|
|
</td>
|
|
<td width="5%"></td>
|
|
<td width="80%">
|
|
|
|
<p>Set the vertical sampling dimension to one of: 1, 2
|
|
(default), or 4.</p>
|
|
</td>
|
|
<td width="0%">
|
|
</td>
|
|
</table></p>
|
|
<a name="SEE ALSO"></a>
|
|
<h2>SEE ALSO</h2>
|
|
<!-- INDENTATION -->
|
|
<p><table width="100%" border=0 rules="none" frame="void"
|
|
cols="2" cellspacing="0" cellpadding="0">
|
|
<tr valign="top" align="left">
|
|
<td width="8%"></td>
|
|
<td width="91%">
|
|
<p><i>tiffinfo</i>(1), <i>tiffcp</i>(1),
|
|
<i>libtiff</i>(3)</p>
|
|
</td>
|
|
</table></p>
|
|
<hr>
|
|
</body>
|
|
</html>
|