1<HTML> 2<HEAD> 3<TITLE> 4TIFF Tools Overview 5</TITLE> 6</HEAD> 7 8<H1> 9<IMG SRC=images/quad.jpg WIDTH=144 HEIGHT=108 ALIGN=left BORDER=1 HSPACE=6> 10TIFF Tools Overview 11</H1> 12 13<P> 14This software distribution comes with a small collection of programs 15for converting non-TIFF format images to TIFF and for manipulating 16and interogating the contents of TIFF images. 17Several of these tools are useful in their own right. 18Many of them however are more intended to serve as programming 19examples for using the TIFF library. 20 21<H3>Device-dependent Programs</H3> 22 23There are two device-dependent programs that serve as simple examples 24for writing programs to display and save TIFF images. 25 26 27<P> 28<TABLE BORDER CELLPADDING=3> 29 30<TR> 31<TD valign=top WIDTH=10%><TT>tiffgt </TT></TD> 32<TD>Display the contents of one or 33more TIFF images on a Silicon Graphics system using 34the Silicon Graphics IRIS GL. 35The software makes extensive use of the <TT>TIFFRGBAImage</TT> 36facilities described elsewhere.</TD> 37</TR> 38 39<TR> 40<TD valign=top WIDTH=10%><TT>tiffsv</TT></TD> 41<TD>A program to save all or part of a screen dump on a Silicon 42Graphics system. 43As for <TT>tiffgt</TT> this code, while written to use the IRIS GL, 44can be easily tailored to other devices.</TD> 45</TR> 46 47</TABLE> 48 49<H3>Device-independent Programs</H3> 50 51The remaining programs should be device-independent: 52 53<P> 54<TABLE BORDER CELLPADDING=3> 55 56<TR> 57<TD VALIGN=top WIDTH=10%><TT>tiffinfo</TT></TD> 58<TD>Display information about one or more TIFF files.</TD> 59</TR> 60 61<TR> 62<TD VALIGN=top WIDTH=10%><TT>tiffdump</TT></TD> 63<TD>Display the verbatim contents of the TIFF directory in a 64 file (it's very useful for debugging bogus files that you may get from 65 someone that claims they support TIFF)</TD> 66</TR> 67 68<TR> 69<TD VALIGN=top WIDTH=10%><TT>tiffcp</TT></TD> 70<TD>Copy, concatenate, and convert TIFF images (e.g. 71 switching from Compression=5 to Compression=1)</TD> 72</TR> 73 74<TR> 75<TD VALIGN=top WIDTH=10%><TT>tiff2ps</TT></TD> 76<TD>Convert TIFF images to PostScript</TD> 77</TR> 78 79<TR> 80<TD VALIGN=top WIDTH=10%><TT>tiffcmp</TT></TD> 81<TD>Compare the contents of two TIFF files (it does 82 not check all the directory information, but does check all the data)</TD> 83</TR> 84 85<TR> 86<TD VALIGN=top WIDTH=10%><TT>tiff2bw</TT></TD> 87<TD>A simple program to convert a color image to grayscale</TD> 88</TR> 89 90<TR> 91<TD VALIGN=top WIDTH=10%><TT>ras2tiff</TT></TD> 92<TD>A quick hack that converts Sun rasterfile format images to 93 TIFF -- it's less than complete</TD> 94</TR> 95 96<TR> 97<TD VALIGN=top WIDTH=10%><TT>rgb2ycbcr</TT></TD> 98<TD>Convert an RGB, grayscale, or bilevel TIFF image to a 99 YCbCr TIFF image; it's mainly provided for testing</TD> 100</TR> 101 102<TR> 103<TD VALIGN=top WIDTH=10%><TT>gif2tiff</TT></TD> 104<TD>A quick hack that converts GIF 87a format images to TIFF</TD> 105</TR> 106 107<TR> 108<TD VALIGN=top WIDTH=10%><TT>ppm2tiff</TT></TD> 109<TD>A quick hack that converts PPM format images to TIFF</TD> 110</TR> 111 112<TR> 113<TD VALIGN=top WIDTH=10%><TT>fax2tiff</TT></TD> 114<TD>Convert raw Group 3 or Group 4 facsimile data to TIFF</TD> 115</TR> 116 117<TR> 118<TD VALIGN=top WIDTH=10%><TT>pal2rgb</TT></TD> 119<TD>Convert a Palette-style image to a full color RGB image by 120 applying the colormap</TD> 121</TR> 122 123<TR> 124<TD VALIGN=top WIDTH=10%><TT>tiffdither</TT></TD> 125<TD>Dither a b&w image into a bilevel image (suitable for 126 use in creating fax files)</TD> 127</TR> 128 129<TR> 130<TD VALIGN=top WIDTH=10%><TT>tiffsplit</TT></TD> 131<TD>Create one or more single-image files from a (possibly) 132 multi-image file</TD> 133</TR> 134 135<TR> 136<TD VALIGN=top WIDTH=10%><TT>fax2ps</TT></TD> 137<TD>Convert a Group 3- or Group 4- compressed TIFF to PostScript 138 that is significantly more compressed than is generated by <TT>tiff2ps</TT> 139 (unless <TT>tiff2ps</TT> writes PS Level II)</TD> 140 141<TR> 142<TD VALIGN=top WIDTH=10%><TT>thumbnail</TT></TD> 143<TD>Copy a bilevel TIFF to one that includes 8-bit greyscale 144 "thumbnail images" for each page; it is provided as an example of 145 how one might use the <TT>SubIFD</TT> tag 146 (and the library support for it)</TD> 147</TR> 148 149<TR> 150<TD VALIGN=top WIDTH=10%><TT>tiffmedian</TT></TD> 151<TD>A version of Paul Heckbert's median cut program 152 that reads an RGB TIFF image, and creates a TIFF palette file as a 153 result; it's useful for converting full-color RGB images to 8-bit 154 color for your friends that have cheapo 8-bit framebuffers.</TD> 155</TR> 156 157<TR> 158<TD VALIGN=top WIDTH=10%><TT>sgi2tiff</TT></TD> 159<TD>A program to convert SGI image files to TIFF. This 160 program is only useful on SGI machines as it uses <TT>-limage</TT>.</TD> 161</TR> 162 163</TABLE> 164 165<P> 166Check out the manual pages for details about the above programs. 167 168 169<P> 170<HR> 171 172<ADDRESS> 173<A HREF="sam.html">Sam Leffler</A> / <A HREF="mailto:[email protected]">[email protected]</A>. 174Last updated: $Date: 1999-08-09 20:21:21 $ 175</ADDRESS> 176 177</BODY> 178<FONT FACE="Arial, Helvetica, Sans"> 179</HTML> 180
