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1 <!-- Creator : groff version 1.18.1 --> |
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2 <!-- CreationDate: Mon Mar 13 18:03:12 2006 --> |
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3 <html> |
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4 <head> |
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5 <meta name="generator" content="groff -Thtml, see www.gnu.org"> |
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6 <meta name="Content-Style" content="text/css"> |
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7 <title>THUMBNAIL</title> |
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8 </head> |
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9 <body> |
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10 |
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11 <h1 align=center>THUMBNAIL</h1> |
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12 <a href="#NAME">NAME</a><br> |
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13 <a href="#SYNOPSIS">SYNOPSIS</a><br> |
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14 <a href="#DESCRIPTION">DESCRIPTION</a><br> |
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15 <a href="#OPTIONS">OPTIONS</a><br> |
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16 <a href="#BUGS">BUGS</a><br> |
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17 <a href="#SEE ALSO">SEE ALSO</a><br> |
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18 |
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19 <hr> |
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20 <a name="NAME"></a> |
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21 <h2>NAME</h2> |
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22 <!-- INDENTATION --> |
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23 <table width="100%" border=0 rules="none" frame="void" |
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24 cols="2" cellspacing="0" cellpadding="0"> |
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25 <tr valign="top" align="left"> |
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26 <td width="8%"></td> |
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27 <td width="91%"> |
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28 <p>thumbnail − create a <small>TIFF</small> file with |
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29 thumbnail images</p> |
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30 </td> |
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31 </table> |
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32 <a name="SYNOPSIS"></a> |
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33 <h2>SYNOPSIS</h2> |
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34 <!-- INDENTATION --> |
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35 <table width="100%" border=0 rules="none" frame="void" |
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36 cols="2" cellspacing="0" cellpadding="0"> |
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37 <tr valign="top" align="left"> |
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38 <td width="8%"></td> |
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39 <td width="91%"> |
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40 <p><b>thumbnail</b> [ <i>options</i> ] <i>input.tif |
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41 output.tif</i></p> |
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42 </td> |
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43 </table> |
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44 <a name="DESCRIPTION"></a> |
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45 <h2>DESCRIPTION</h2> |
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46 <!-- INDENTATION --> |
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47 <table width="100%" border=0 rules="none" frame="void" |
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48 cols="2" cellspacing="0" cellpadding="0"> |
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49 <tr valign="top" align="left"> |
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50 <td width="8%"></td> |
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51 <td width="91%"> |
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52 <p><i>thumbnail</i> is a program written to show how one |
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53 might use the SubIFD tag (#330) to store thumbnail images. |
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54 <i>thumbnail</i> copies a <small>TIFF</small> Class F |
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55 facsimile file to the output file and for each image an |
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56 8-bit greyscale <i>thumbnail sketch</i>. The output file |
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57 contains the thumbnail image with the associated |
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58 full-resolution page linked below with the SubIFD tag.</p> |
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59 <!-- INDENTATION --> |
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60 <p>By default, thumbnail images are 216 pixels wide by 274 |
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61 pixels high. Pixels are calculated by sampling and filtering |
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62 the input image with each pixel value passed through a |
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63 contrast curve.</p> |
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64 </td> |
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65 </table> |
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66 <a name="OPTIONS"></a> |
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67 <h2>OPTIONS</h2> |
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68 <!-- TABS --> |
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69 <table width="100%" border=0 rules="none" frame="void" |
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70 cols="5" cellspacing="0" cellpadding="0"> |
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71 <tr valign="top" align="left"> |
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72 <td width="10%"></td> |
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73 <td width="3%"> |
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74 |
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75 <p><b>−w</b></p> |
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76 </td> |
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77 <td width="5%"></td> |
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78 <td width="80%"> |
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79 |
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80 <p>Specify the width of thumbnail images in pixels.</p> |
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81 </td> |
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82 <td width="0%"> |
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83 </td> |
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84 <tr valign="top" align="left"> |
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85 <td width="10%"></td> |
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86 <td width="3%"> |
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87 |
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88 <p><b>−h</b></p> |
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89 </td> |
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90 <td width="5%"></td> |
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91 <td width="80%"> |
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92 |
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93 <p>Specify the height of thumbnail images in pixels.</p> |
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94 </td> |
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95 <td width="0%"> |
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96 </td> |
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97 <tr valign="top" align="left"> |
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98 <td width="10%"></td> |
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99 <td width="3%"> |
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100 |
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101 <p><b>−c</b></p> |
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102 </td> |
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103 <td width="5%"></td> |
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104 <td width="80%"> |
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105 |
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106 <p>Specify a contrast curve to apply in generating the |
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107 thumbnail images. By default pixels values are passed |
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108 through a linear contrast curve that simply maps the pixel |
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109 value ranges. Alternative curves are: <b>exp50</b> for a 50% |
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110 exponential curve, <b>exp60</b> for a 60% exponential curve, |
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111 <b>exp70</b> for a 70% exponential curve, <b>exp80</b> for a |
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112 80% exponential curve, <b>exp90</b> for a 90% exponential |
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113 curve, <b>exp</b> for a pure exponential curve, |
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114 <b>linear</b> for a linear curve.</p> |
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115 </td> |
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116 <td width="0%"> |
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117 </td> |
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118 </table> |
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119 <a name="BUGS"></a> |
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120 <h2>BUGS</h2> |
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121 <!-- INDENTATION --> |
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122 <table width="100%" border=0 rules="none" frame="void" |
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123 cols="2" cellspacing="0" cellpadding="0"> |
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124 <tr valign="top" align="left"> |
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125 <td width="8%"></td> |
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126 <td width="91%"> |
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127 <p>There are no options to control the format of the saved |
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128 thumbnail images.</p> |
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129 </td> |
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130 </table> |
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131 <a name="SEE ALSO"></a> |
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132 <h2>SEE ALSO</h2> |
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133 <!-- INDENTATION --> |
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134 <table width="100%" border=0 rules="none" frame="void" |
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135 cols="2" cellspacing="0" cellpadding="0"> |
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136 <tr valign="top" align="left"> |
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137 <td width="8%"></td> |
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138 <td width="91%"> |
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139 <p><b>tiffdump</b>(1), <b>tiffgt</b>(1), <b>tiffinfo</b>(1), |
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140 <b>libtiff</b>(3)</p> |
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141 <!-- INDENTATION --> |
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142 <p>Libtiff library home page: |
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143 <b>http://www.remotesensing.org/libtiff/</b></p> |
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144 </td> |
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145 </table> |
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146 <hr> |
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147 </body> |
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148 </html> |