projects / wxWidgets.git / blame
| Commit | Line | Data |
|---|---|---|
| 8414a40c | 1 | <!-- Creator : groff version 1.18.1 --> |
| 80ed523f | 2 | <!-- CreationDate: Sat Feb 24 18:37:20 2007 --> |
| 8414a40c VZ |
3 | <html> |
| 4 | <head> | |
| 5 | <meta name="generator" content="groff -Thtml, see www.gnu.org"> | |
| 6 | <meta name="Content-Style" content="text/css"> | |
| 7 | <title>TIFFDITHER</title> | |
| 8 | </head> | |
| 9 | <body> | |
| 10 | ||
| 11 | <h1 align=center>TIFFDITHER</h1> | |
| 12 | <a href="#NAME">NAME</a><br> | |
| 13 | <a href="#SYNOPSIS">SYNOPSIS</a><br> | |
| 14 | <a href="#DESCRIPTION">DESCRIPTION</a><br> | |
| 15 | <a href="#OPTIONS">OPTIONS</a><br> | |
| 16 | <a href="#NOTES">NOTES</a><br> | |
| 17 | <a href="#SEE ALSO">SEE ALSO</a><br> | |
| 18 | ||
| 19 | <hr> | |
| 20 | <a name="NAME"></a> | |
| 21 | <h2>NAME</h2> | |
| 22 | <!-- INDENTATION --> | |
| 23 | <table width="100%" border=0 rules="none" frame="void" | |
| 24 | cols="2" cellspacing="0" cellpadding="0"> | |
| 25 | <tr valign="top" align="left"> | |
| 26 | <td width="8%"></td> | |
| 27 | <td width="91%"> | |
| 28 | <p>tiffdither − convert a greyscale image to bilevel | |
| 29 | using dithering</p> | |
| 30 | </td> | |
| 31 | </table> | |
| 32 | <a name="SYNOPSIS"></a> | |
| 33 | <h2>SYNOPSIS</h2> | |
| 34 | <!-- INDENTATION --> | |
| 35 | <table width="100%" border=0 rules="none" frame="void" | |
| 36 | cols="2" cellspacing="0" cellpadding="0"> | |
| 37 | <tr valign="top" align="left"> | |
| 38 | <td width="8%"></td> | |
| 39 | <td width="91%"> | |
| 40 | <p><b>tiffdither</b> [ <i>options</i> ] <i>input.tif | |
| 41 | output.tif</i></p> | |
| 42 | </td> | |
| 43 | </table> | |
| 44 | <a name="DESCRIPTION"></a> | |
| 45 | <h2>DESCRIPTION</h2> | |
| 46 | <!-- INDENTATION --> | |
| 47 | <table width="100%" border=0 rules="none" frame="void" | |
| 48 | cols="2" cellspacing="0" cellpadding="0"> | |
| 49 | <tr valign="top" align="left"> | |
| 50 | <td width="8%"></td> | |
| 51 | <td width="91%"> | |
| 52 | <p><i>tiffdither</i> converts a single channel 8-bit | |
| 53 | greyscale image to a bilevel image using Floyd-Steinberg | |
| 54 | error propagation with thresholding.</p> | |
| 55 | </td> | |
| 56 | </table> | |
| 57 | <a name="OPTIONS"></a> | |
| 58 | <h2>OPTIONS</h2> | |
| 59 | <!-- TABS --> | |
| 60 | <table width="100%" border=0 rules="none" frame="void" | |
| 61 | cols="5" cellspacing="0" cellpadding="0"> | |
| 62 | <tr valign="top" align="left"> | |
| 63 | <td width="10%"></td> | |
| 64 | <td width="2%"> | |
| 65 | ||
| 66 | <p><b>−c</b></p> | |
| 67 | </td> | |
| 68 | <td width="6%"></td> | |
| 69 | <td width="80%"> | |
| 70 | ||
| 71 | <p>Specify the compression to use for data written to the | |
| 72 | output file: <b>none</b> for no compression, <b>packbits</b> | |
| 73 | for PackBits compression, <b>lzw</b> for Lempel-Ziv & | |
| 74 | Welch compression, <b>zip</b> for Deflate compression, | |
| 75 | <b>g3</b> for CCITT Group 3 (T.4) compression, and <b>g4</b> | |
| 76 | for CCITT Group 4 (T.6) compression. By default | |
| 77 | <i>tiffdither</i> will compress data according to the value | |
| 78 | of the <i>Compression</i> tag found in the source file.</p> | |
| 79 | </td> | |
| 80 | <td width="0%"> | |
| 81 | </td> | |
| 82 | </table> | |
| 83 | <!-- INDENTATION --> | |
| 84 | <table width="100%" border=0 rules="none" frame="void" | |
| 85 | cols="2" cellspacing="0" cellpadding="0"> | |
| 86 | <tr valign="top" align="left"> | |
| 87 | <td width="17%"></td> | |
| 88 | <td width="82%"> | |
| 89 | <p>The <small>CCITT</small> Group 3 and Group 4 compression | |
| 90 | algorithms can only be used with bilevel data.</p> | |
| 91 | <!-- INDENTATION --> | |
| 92 | <p>Group 3 compression can be specified together with | |
| 93 | several T.4-specific options: <b>1d</b> for 1-dimensional | |
| 94 | encoding, <b>2d</b> for 2-dimensional encoding, and | |
| 95 | <b>fill</b> to force each encoded scanline to be zero-filled | |
| 96 | so that the terminating EOL code lies on a byte boundary. | |
| 97 | Group 3-specific options are specified by appending a | |
| 98 | ‘‘:’’-separated list to the | |
| 99 | ‘‘g3’’ option; e.g. <b>−c | |
| 100 | g3:2d:fill</b> to get 2D-encoded data with byte-aligned EOL | |
| 101 | codes.</p> | |
| 102 | <!-- INDENTATION --> | |
| 103 | <p><small>LZW</small> compression can be specified together | |
| 104 | with a <i>predictor</i> value. A predictor value of 2 causes | |
| 105 | each scanline of the output image to undergo horizontal | |
| 106 | differencing before it is encoded; a value of 1 forces each | |
| 107 | scanline to be encoded without differencing. LZW-specific | |
| 108 | options are specified by appending a | |
| 109 | ‘‘:’’-separated list to the | |
| 110 | ‘‘lzw’’ option; e.g. <b>−c | |
| 111 | lzw:2</b> for <small>LZW</small> compression with horizontal | |
| 112 | differencing.</p> | |
| 113 | </td> | |
| 114 | </table> | |
| 115 | <!-- TABS --> | |
| 116 | <table width="100%" border=0 rules="none" frame="void" | |
| 117 | cols="5" cellspacing="0" cellpadding="0"> | |
| 118 | <tr valign="top" align="left"> | |
| 119 | <td width="10%"></td> | |
| 120 | <td width="3%"> | |
| 121 | ||
| 122 | <p><b>−f</b></p> | |
| 123 | </td> | |
| 124 | <td width="5%"></td> | |
| 125 | <td width="80%"> | |
| 126 | ||
| 127 | <p>Specify the bit fill order to use in writing output | |
| 128 | data. By default, <i>tiffdither</i> will create a new file | |
| 129 | with the same fill order as the original. Specifying | |
| 130 | <b>−f lsb2msb</b> will force data to be written with | |
| 80ed523f VZ |
131 | the <i>FillOrder</i> tag set to <small>LSB2MSB ,</small> |
| 132 | while <b>−f msb2lsb</b> will force data to be written | |
| 133 | with the <i>Fill- Order</i> tag set to <small>MSB2LSB | |
| 134 | .</small></p> | |
| 8414a40c VZ |
135 | </td> |
| 136 | <td width="0%"> | |
| 137 | </td> | |
| 138 | <tr valign="top" align="left"> | |
| 139 | <td width="10%"></td> | |
| 140 | <td width="3%"> | |
| 141 | ||
| 142 | <p><b>−t</b></p> | |
| 143 | </td> | |
| 144 | <td width="5%"></td> | |
| 145 | <td width="80%"> | |
| 146 | ||
| 147 | <p>Set the threshold value for dithering. By default the | |
| 148 | threshold value is 128.</p> | |
| 149 | </td> | |
| 150 | <td width="0%"> | |
| 151 | </td> | |
| 152 | </table> | |
| 153 | <a name="NOTES"></a> | |
| 154 | <h2>NOTES</h2> | |
| 155 | <!-- INDENTATION --> | |
| 156 | <table width="100%" border=0 rules="none" frame="void" | |
| 157 | cols="2" cellspacing="0" cellpadding="0"> | |
| 158 | <tr valign="top" align="left"> | |
| 159 | <td width="8%"></td> | |
| 160 | <td width="91%"> | |
| 161 | <p>The dither algorithm is taken from the | |
| 162 | <b>tiffmedian</b>(1) program (written by Paul Heckbert).</p> | |
| 163 | </td> | |
| 164 | </table> | |
| 165 | <a name="SEE ALSO"></a> | |
| 166 | <h2>SEE ALSO</h2> | |
| 167 | <!-- INDENTATION --> | |
| 168 | <table width="100%" border=0 rules="none" frame="void" | |
| 169 | cols="2" cellspacing="0" cellpadding="0"> | |
| 170 | <tr valign="top" align="left"> | |
| 171 | <td width="8%"></td> | |
| 172 | <td width="91%"> | |
| 173 | <p><b>pal2rgb</b>(1), <b>fax2tiff</b>(1), | |
| 174 | <b>tiffinfo</b>(1), <b>tiffcp</b>(1), <b>tiff2bw</b>(1), | |
| 175 | <b>libtiff</b>(3TIFF)</p> | |
| 176 | <!-- INDENTATION --> | |
| 177 | <p>Libtiff library home page: | |
| 178 | <b>http://www.remotesensing.org/libtiff/</b></p> | |
| 179 | </td> | |
| 180 | </table> | |
| 181 | <hr> | |
| 182 | </body> | |
| 183 | </html> |