1<HTML> 2<HEAD> 3<TITLE> 4TIFF Tools Overview 5</TITLE> 6</HEAD> 7<BODY BGCOLOR=WHITE> 8<FONT FACE="Arial, Helvetica, Sans"> 9<H1> 10<IMG SRC=images/quad.jpg WIDTH=144 HEIGHT=108 ALIGN=left BORDER=1 HSPACE=6> 11TIFF Tools Overview 12</H1> 13 14<P> 15This software distribution comes with a small collection of programs 16for converting non-TIFF format images to TIFF and for manipulating 17and interogating the contents of TIFF images. 18Several of these tools are useful in their own right. 19Many of them however are more intended to serve as programming 20examples for using the TIFF library. 21 22<H3>Device-dependent Programs</H3> 23 24There are two device-dependent programs that serve as simple examples 25for writing programs to display and save TIFF images. 26 27 28<P> 29<TABLE BORDER CELLPADDING=3> 30 31<TR> 32<TD valign=top WIDTH=10%><TT>tiffgt </TT></TD> 33<TD>Display the contents of one or 34more TIFF images on a Silicon Graphics system using 35the Silicon Graphics IRIS GL. 36The software makes extensive use of the <TT>TIFFRGBAImage</TT> 37facilities described elsewhere.</TD> 38</TR> 39 40<TR> 41<TD valign=top WIDTH=10%><TT>tiffsv</TT></TD> 42<TD>A program to save all or part of a screen dump on a Silicon 43Graphics system. 44As for <TT>tiffgt</TT> this code, while written to use the IRIS GL, 45can be easily tailored to other devices.</TD> 46</TR> 47 48</TABLE> 49 50<H3>Device-independent Programs</H3> 51 52The remaining programs should be device-independent: 53 54<P> 55<TABLE BORDER CELLPADDING=3> 56 57<TR> 58<TD VALIGN=top WIDTH=10%><TT>tiffinfo</TT></TD> 59<TD>Display information about one or more TIFF files.</TD> 60</TR> 61 62<TR> 63<TD VALIGN=top WIDTH=10%><TT>tiffdump</TT></TD> 64<TD>Display the verbatim contents of the TIFF directory in a 65 file (it's very useful for debugging bogus files that you may get from 66 someone that claims they support TIFF)</TD> 67</TR> 68 69<TR> 70<TD VALIGN=top WIDTH=10%><TT>tiffcp</TT></TD> 71<TD>Copy, concatenate, and convert TIFF images (e.g. 72 switching from Compression=5 to Compression=1)</TD> 73</TR> 74 75<TR> 76<TD VALIGN=top WIDTH=10%><TT>tiff2ps</TT></TD> 77<TD>Convert TIFF images to PostScript</TD> 78</TR> 79 80<TR> 81<TD VALIGN=top WIDTH=10%><TT>tiffcmp</TT></TD> 82<TD>Compare the contents of two TIFF files (it does 83 not check all the directory information, but does check all the data)</TD> 84</TR> 85 86<TR> 87<TD VALIGN=top WIDTH=10%><TT>tiff2bw</TT></TD> 88<TD>A simple program to convert a color image to grayscale</TD> 89</TR> 90 91<TR> 92<TD VALIGN=top WIDTH=10%><TT>ras2tiff</TT></TD> 93<TD>A quick hack that converts Sun rasterfile format images to 94 TIFF -- it's less than complete</TD> 95</TR> 96 97<TR> 98<TD VALIGN=top WIDTH=10%><TT>rgb2ycbcr</TT></TD> 99<TD>Convert an RGB, grayscale, or bilevel TIFF image to a 100 YCbCr TIFF image; it's mainly provided for testing</TD> 101</TR> 102 103<TR> 104<TD VALIGN=top WIDTH=10%><TT>gif2tiff</TT></TD> 105<TD>A quick hack that converts GIF 87a format images to TIFF</TD> 106</TR> 107 108<TR> 109<TD VALIGN=top WIDTH=10%><TT>ppm2tiff</TT></TD> 110<TD>A quick hack that converts PPM format images to TIFF</TD> 111</TR> 112 113<TR> 114<TD VALIGN=top WIDTH=10%><TT>fax2tiff</TT></TD> 115<TD>Convert raw Group 3 or Group 4 facsimile data to TIFF</TD> 116</TR> 117 118<TR> 119<TD VALIGN=top WIDTH=10%><TT>pal2rgb</TT></TD> 120<TD>Convert a Palette-style image to a full color RGB image by 121 applying the colormap</TD> 122</TR> 123 124<TR> 125<TD VALIGN=top WIDTH=10%><TT>tiffdither</TT></TD> 126<TD>Dither a b&w image into a bilevel image (suitable for 127 use in creating fax files)</TD> 128</TR> 129 130<TR> 131<TD VALIGN=top WIDTH=10%><TT>tiffsplit</TT></TD> 132<TD>Create one or more single-image files from a (possibly) 133 multi-image file</TD> 134</TR> 135 136<TR> 137<TD VALIGN=top WIDTH=10%><TT>fax2ps</TT></TD> 138<TD>Convert a Group 3- or Group 4- compressed TIFF to PostScript 139 that is significantly more compressed than is generated by <TT>tiff2ps</TT> 140 (unless <TT>tiff2ps</TT> writes PS Level II)</TD> 141 142<TR> 143<TD VALIGN=top WIDTH=10%><TT>thumbnail</TT></TD> 144<TD>Copy a bilevel TIFF to one that includes 8-bit greyscale 145 "thumbnail images" for each page; it is provided as an example of 146 how one might use the <TT>SubIFD</TT> tag 147 (and the library support for it)</TD> 148</TR> 149 150<TR> 151<TD VALIGN=top WIDTH=10%><TT>tiffmedian</TT></TD> 152<TD>A version of Paul Heckbert's median cut program 153 that reads an RGB TIFF image, and creates a TIFF palette file as a 154 result; it's useful for converting full-color RGB images to 8-bit 155 color for your friends that have cheapo 8-bit framebuffers.</TD> 156</TR> 157 158<TR> 159<TD VALIGN=top WIDTH=10%><TT>sgi2tiff</TT></TD> 160<TD>A program to convert SGI image files to TIFF. This 161 program is only useful on SGI machines as it uses <TT>-limage</TT>.</TD> 162</TR> 163 164</TABLE> 165 166<P> 167Check out the manual pages for details about the above programs. 168 169 170<P> 171<HR> 172 173 174Last updated: $Date: 1999-08-13 19:30:57 $ 175 176 177</BODY> 178</HTML> 179
