diff options
| author | Chris Liddell <chris.liddell@artifex.com> | 2013-07-23 16:24:19 +0100 |
|---|---|---|
| committer | Chris Liddell <chris.liddell@artifex.com> | 2015-07-20 18:21:17 +0100 |
| commit | 6948650efd3fb9e2a70b8cf16aca57e9d0b7eb0a (patch) | |
| tree | 5c2a1c671c1d4521f8a770d1e69e3d4342718030 /tiff/html/man/tiffdither.1.html | |
| parent | 7fd9e0be26e67c36f87733bc89ea07dc26d9f839 (diff) | |
| download | ghostpdl-6948650efd3fb9e2a70b8cf16aca57e9d0b7eb0a.tar.gz | |
Commit of build_consolidation branch
Squashed into one commit (see branch for details of the evolution of the
branch).
This brings gpcl6 and gxps into the Ghostscript build system, and a shared
set of graphics library object files for all the interpreters.
Also, brings the same configuration options to the pcl and xps products as we
have for Ghostscript.
Diffstat (limited to 'tiff/html/man/tiffdither.1.html')
| -rw-r--r-- | tiff/html/man/tiffdither.1.html | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/tiff/html/man/tiffdither.1.html b/tiff/html/man/tiffdither.1.html new file mode 100644 index 000000000..5e3cb7c5d --- /dev/null +++ b/tiff/html/man/tiffdither.1.html @@ -0,0 +1,183 @@ +<!-- Creator : groff version 1.18.1 --> +<!-- CreationDate: Sat Feb 24 18:37:20 2007 --> +<html> +<head> +<meta name="generator" content="groff -Thtml, see www.gnu.org"> +<meta name="Content-Style" content="text/css"> +<title>TIFFDITHER</title> +</head> +<body> + +<h1 align=center>TIFFDITHER</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="#NOTES">NOTES</a><br> +<a href="#SEE ALSO">SEE ALSO</a><br> + +<hr> +<a name="NAME"></a> +<h2>NAME</h2> +<!-- INDENTATION --> +<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>tiffdither − convert a greyscale image to bilevel +using dithering</p> +</td> +</table> +<a name="SYNOPSIS"></a> +<h2>SYNOPSIS</h2> +<!-- INDENTATION --> +<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>tiffdither</b> [ <i>options</i> ] <i>input.tif +output.tif</i></p> +</td> +</table> +<a name="DESCRIPTION"></a> +<h2>DESCRIPTION</h2> +<!-- INDENTATION --> +<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>tiffdither</i> converts a single channel 8-bit +greyscale image to a bilevel image using Floyd-Steinberg +error propagation with thresholding.</p> +</td> +</table> +<a name="OPTIONS"></a> +<h2>OPTIONS</h2> +<!-- TABS --> +<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="2%"> + +<p><b>−c</b></p> +</td> +<td width="6%"></td> +<td width="80%"> + +<p>Specify the compression to use for data written to the +output file: <b>none</b> for no compression, <b>packbits</b> +for PackBits compression, <b>lzw</b> for Lempel-Ziv & +Welch compression, <b>zip</b> for Deflate compression, +<b>g3</b> for CCITT Group 3 (T.4) compression, and <b>g4</b> +for CCITT Group 4 (T.6) compression. By default +<i>tiffdither</i> will compress data according to the value +of the <i>Compression</i> tag found in the source file.</p> +</td> +<td width="0%"> +</td> +</table> +<!-- INDENTATION --> +<table width="100%" border=0 rules="none" frame="void" + cols="2" cellspacing="0" cellpadding="0"> +<tr valign="top" align="left"> +<td width="17%"></td> +<td width="82%"> +<p>The <small>CCITT</small> Group 3 and Group 4 compression +algorithms can only be used with bilevel data.</p> +<!-- INDENTATION --> +<p>Group 3 compression can be specified together with +several T.4-specific options: <b>1d</b> for 1-dimensional +encoding, <b>2d</b> for 2-dimensional encoding, and +<b>fill</b> to force each encoded scanline to be zero-filled +so that the terminating EOL code lies on a byte boundary. +Group 3-specific options are specified by appending a +‘‘:’’-separated list to the +‘‘g3’’ option; e.g. <b>−c +g3:2d:fill</b> to get 2D-encoded data with byte-aligned EOL +codes.</p> +<!-- INDENTATION --> +<p><small>LZW</small> compression can be specified together +with a <i>predictor</i> value. A predictor value of 2 causes +each scanline of the output image to undergo horizontal +differencing before it is encoded; a value of 1 forces each +scanline to be encoded without differencing. LZW-specific +options are specified by appending a +‘‘:’’-separated list to the +‘‘lzw’’ option; e.g. <b>−c +lzw:2</b> for <small>LZW</small> compression with horizontal +differencing.</p> +</td> +</table> +<!-- TABS --> +<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>−f</b></p> +</td> +<td width="5%"></td> +<td width="80%"> + +<p>Specify the bit fill order to use in writing output +data. By default, <i>tiffdither</i> will create a new file +with the same fill order as the original. Specifying +<b>−f lsb2msb</b> will force data to be written with +the <i>FillOrder</i> tag set to <small>LSB2MSB ,</small> +while <b>−f msb2lsb</b> will force data to be written +with the <i>Fill- Order</i> tag set to <small>MSB2LSB +.</small></p> +</td> +<td width="0%"> +</td> +<tr valign="top" align="left"> +<td width="10%"></td> +<td width="3%"> + +<p><b>−t</b></p> +</td> +<td width="5%"></td> +<td width="80%"> + +<p>Set the threshold value for dithering. By default the +threshold value is 128.</p> +</td> +<td width="0%"> +</td> +</table> +<a name="NOTES"></a> +<h2>NOTES</h2> +<!-- INDENTATION --> +<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>The dither algorithm is taken from the +<b>tiffmedian</b>(1) program (written by Paul Heckbert).</p> +</td> +</table> +<a name="SEE ALSO"></a> +<h2>SEE ALSO</h2> +<!-- INDENTATION --> +<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>pal2rgb</b>(1), <b>fax2tiff</b>(1), +<b>tiffinfo</b>(1), <b>tiffcp</b>(1), <b>tiff2bw</b>(1), +<b>libtiff</b>(3TIFF)</p> +<!-- INDENTATION --> +<p>Libtiff library home page: +<b>http://www.remotesensing.org/libtiff/</b></p> +</td> +</table> +<hr> +</body> +</html> |