1999-07-27 17:50:26 -04:00
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<HTML>
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<HEAD>
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<TITLE>
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TIFF Tools Overview
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</TITLE>
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</HEAD>
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1999-08-13 15:30:57 -04:00
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<BODY BGCOLOR=WHITE>
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<FONT FACE="Arial, Helvetica, Sans">
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1999-07-27 17:50:26 -04:00
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<H1>
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<IMG SRC=images/quad.jpg WIDTH=144 HEIGHT=108 ALIGN=left BORDER=1 HSPACE=6>
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TIFF Tools Overview
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</H1>
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<P>
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This software distribution comes with a small collection of programs
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for converting non-TIFF format images to TIFF and for manipulating
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and interogating the contents of TIFF images.
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Several of these tools are useful in their own right.
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Many of them however are more intended to serve as programming
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examples for using the TIFF library.
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<H3>Device-dependent Programs</H3>
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There are two device-dependent programs that serve as simple examples
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for writing programs to display and save TIFF images.
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<P>
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<TABLE BORDER CELLPADDING=3>
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<TR>
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<TD valign=top WIDTH=10%><TT>tiffgt </TT></TD>
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<TD>Display the contents of one or
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more TIFF images on a Silicon Graphics system using
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the Silicon Graphics IRIS GL.
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The software makes extensive use of the <TT>TIFFRGBAImage</TT>
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facilities described elsewhere.</TD>
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</TR>
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<TR>
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<TD valign=top WIDTH=10%><TT>tiffsv</TT></TD>
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<TD>A program to save all or part of a screen dump on a Silicon
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Graphics system.
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As for <TT>tiffgt</TT> this code, while written to use the IRIS GL,
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can be easily tailored to other devices.</TD>
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</TR>
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</TABLE>
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<H3>Device-independent Programs</H3>
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The remaining programs should be device-independent:
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<P>
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<TABLE BORDER CELLPADDING=3>
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<TR>
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<TD VALIGN=top WIDTH=10%><TT>tiffinfo</TT></TD>
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<TD>Display information about one or more TIFF files.</TD>
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</TR>
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<TR>
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<TD VALIGN=top WIDTH=10%><TT>tiffdump</TT></TD>
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<TD>Display the verbatim contents of the TIFF directory in a
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file (it's very useful for debugging bogus files that you may get from
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someone that claims they support TIFF)</TD>
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</TR>
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<TR>
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<TD VALIGN=top WIDTH=10%><TT>tiffcp</TT></TD>
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<TD>Copy, concatenate, and convert TIFF images (e.g.
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switching from Compression=5 to Compression=1)</TD>
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</TR>
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<TR>
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<TD VALIGN=top WIDTH=10%><TT>tiff2ps</TT></TD>
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<TD>Convert TIFF images to PostScript</TD>
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</TR>
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<TR>
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<TD VALIGN=top WIDTH=10%><TT>tiffcmp</TT></TD>
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<TD>Compare the contents of two TIFF files (it does
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not check all the directory information, but does check all the data)</TD>
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</TR>
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<TR>
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<TD VALIGN=top WIDTH=10%><TT>tiff2bw</TT></TD>
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<TD>A simple program to convert a color image to grayscale</TD>
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</TR>
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<TR>
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<TD VALIGN=top WIDTH=10%><TT>ras2tiff</TT></TD>
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<TD>A quick hack that converts Sun rasterfile format images to
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TIFF -- it's less than complete</TD>
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</TR>
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<TR>
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<TD VALIGN=top WIDTH=10%><TT>rgb2ycbcr</TT></TD>
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<TD>Convert an RGB, grayscale, or bilevel TIFF image to a
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YCbCr TIFF image; it's mainly provided for testing</TD>
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</TR>
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<TR>
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<TD VALIGN=top WIDTH=10%><TT>gif2tiff</TT></TD>
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<TD>A quick hack that converts GIF 87a format images to TIFF</TD>
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</TR>
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<TR>
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<TD VALIGN=top WIDTH=10%><TT>ppm2tiff</TT></TD>
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<TD>A quick hack that converts PPM format images to TIFF</TD>
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</TR>
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<TR>
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<TD VALIGN=top WIDTH=10%><TT>fax2tiff</TT></TD>
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<TD>Convert raw Group 3 or Group 4 facsimile data to TIFF</TD>
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</TR>
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<TR>
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<TD VALIGN=top WIDTH=10%><TT>pal2rgb</TT></TD>
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<TD>Convert a Palette-style image to a full color RGB image by
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applying the colormap</TD>
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</TR>
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<TR>
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<TD VALIGN=top WIDTH=10%><TT>tiffdither</TT></TD>
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<TD>Dither a b&w image into a bilevel image (suitable for
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use in creating fax files)</TD>
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</TR>
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<TR>
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<TD VALIGN=top WIDTH=10%><TT>tiffsplit</TT></TD>
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<TD>Create one or more single-image files from a (possibly)
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multi-image file</TD>
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</TR>
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<TR>
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<TD VALIGN=top WIDTH=10%><TT>fax2ps</TT></TD>
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<TD>Convert a Group 3- or Group 4- compressed TIFF to PostScript
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that is significantly more compressed than is generated by <TT>tiff2ps</TT>
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(unless <TT>tiff2ps</TT> writes PS Level II)</TD>
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<TR>
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<TD VALIGN=top WIDTH=10%><TT>thumbnail</TT></TD>
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<TD>Copy a bilevel TIFF to one that includes 8-bit greyscale
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"thumbnail images" for each page; it is provided as an example of
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how one might use the <TT>SubIFD</TT> tag
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(and the library support for it)</TD>
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</TR>
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<TR>
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<TD VALIGN=top WIDTH=10%><TT>tiffmedian</TT></TD>
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<TD>A version of Paul Heckbert's median cut program
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that reads an RGB TIFF image, and creates a TIFF palette file as a
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result; it's useful for converting full-color RGB images to 8-bit
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color for your friends that have cheapo 8-bit framebuffers.</TD>
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</TR>
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<TR>
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<TD VALIGN=top WIDTH=10%><TT>sgi2tiff</TT></TD>
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<TD>A program to convert SGI image files to TIFF. This
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program is only useful on SGI machines as it uses <TT>-limage</TT>.</TD>
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</TR>
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</TABLE>
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<P>
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Check out the manual pages for details about the above programs.
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<P>
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<HR>
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1999-08-13 15:30:57 -04:00
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Last updated: $Date: 1999-08-13 19:30:57 $
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1999-07-27 17:50:26 -04:00
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</BODY>
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</HTML>
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