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diff --git a/tiff/html/man/tiffdither.1.html b/tiff/html/man/tiffdither.1.html new file mode 100644 index 0000000..2427a90 --- /dev/null +++ b/tiff/html/man/tiffdither.1.html @@ -0,0 +1,183 @@ +<!-- Creator : groff version 1.18.1 --> +<!-- CreationDate: Fri Jul 13 17:43:19 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> |