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<html>
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__header1__
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<body>
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__sidebar1__
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<div id="content">
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__maintitle__
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<h2>Exiv2 Overview</h2>
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<p>Exiv2 is a <a href="#lib">C++ library</a> and a <a href="#util">command line utility</a>
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to manage image <a href="http://en.wikipedia.org/wiki/Metadata">metadata</a>.
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It provides fast and easy read and write access to the
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<a href="http://en.wikipedia.org/wiki/Exif">Exif</a>,
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<a href="http://en.wikipedia.org/wiki/IPTC">IPTC</a> and
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<a href="http://en.wikipedia.org/wiki/Extensible_Metadata_Platform">XMP</a> metadata
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of images in <a href="http://dev.exiv2.org/projects/exiv2/wiki/Supported_image_formats">various formats</a>.
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Exiv2 is available as <a href="download.html#license">free software</a> and with a
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<a href="download.html#license">commercial license</a>, and is used in many projects</a>.</p>
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<p><a name="lib">The Exiv2 library provides</a></p>
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<ul>
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<li>
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<table cellspacing="0" align="right" border="0" cellpadding="0">
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<tr>
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<td>
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<div id="ohloh_factoids">
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<script type="text/javascript" src="http://www.ohloh.net/p/13985/widgets/project_factoids.js"></script>
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</div>
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</td>
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</tr>
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</table>
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fast read and write access to the Exif, IPTC, and XMP metadata
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of an image
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</li>
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<li>an easy to use and <a href="doc/index.html" title="Exiv2 API documentation">extensively documented</a> API</li>
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<li><a href="conversion.html" title="Exiv2 Conversions">conversions</a> of Exif and IPTC metadata to XMP and vice versa</li>
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<li>a smart IPTC implementation that does not affect data that programs like Photoshop store
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in the same image segment</li>
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<li>Exif <a href="makernote.html" title="Exif Makernote Formats and Specifications">Makernote</a> support:
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<ul>
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<li>Makernote tags can be read and written just like any other metadata</li>
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<li>a sophisticated write algorithm avoids corrupting the Makernote</li>
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</ul>
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</li>
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<li>a simple interface to extract previews embedded in RAW images and Exif thumbnails</li>
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<li>set and delete methods for Exif thumbnails</li>
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</ul>
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<p>Examples: <a title="Reading and printing the Exif metadata of an image" href="example1.html">read Exif</a>;
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<a title="Sample usage of high-level Exif metadata operations" href="example2.html">add, modify, delete Exif</a>;
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<a title="Reading and printing the IPTC metadata of an image" href="example3.html">read IPTC</a>;
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<a title="The quickest way to access, set or modify IPTC metadata" href="example4.html">set IPTC</a>;
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<a title="Sample (test) usage of high level XMP classes" href="example5.html">set XMP</a>
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</p>
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<p><a name="util">Exiv2 is also a command line utility to</a></p>
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<ul>
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<li>print Exif, IPTC and XMP image metadata in different formats: Exif summary info, interpreted values,
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or the plain data for each tag (a <a title="Sample Exiv2 utility output" href="sample.html">sample</a> is here)</li>
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<li><a title="Modify" href="sample.html#modify">set, add and delete</a> Exif, IPTC and XMP image metadata
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from command line modify commands or command scripts</li>
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<li>adjust the Exif timestamp (that's how it all started...)</li>
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<li>rename Exif image files according to the Exif timestamp</li>
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<li>extract, insert and delete Exif, IPTC and XMP metadata and JPEG comments</li>
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<li><a href="conversion.html" title="Exiv2 Conversions">convert</a> from Exif and IPTC to XMP properties and vice versa</li>
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<li>extract previews from RAW images and thumbnails from the Exif metadata</li>
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<li>insert and delete the thumbnail image embedded in the Exif metadata</li>
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<li>print, set and delete the JPEG comment of JPEG images</li>
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<li>fix the Exif ISO setting of picture taken with Canon and Nikon cameras</li>
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</ul>
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<p>Future plans include</p>
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<ul>
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<li>a unified metadata container</li>
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<li>support for additional image formats</li>
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<li>more Makernotes</li>
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<li>to support CMake on all platforms</li>
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</ul>
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<p>The <a href="http://dev.exiv2.org/projects/exiv2/roadmap">roadmap</a> has details for the upcoming version.</p>
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__footer__
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</div>
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__tracker__
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</body>
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</html>
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