EXIF/IPTC metadata manipulation library Exiv2 library supports: * full read and write access to the EXIF and IPTC metadata of an image through Exiv2 keys and standard C++ iterators * a smart IPTC implementation that does not affect data that programs like Photoshop store in the same image segment * EXIF MakerNote support: o MakerNote tags can be accessed just like any other EXIF metadata o a sophisticated write algorithm avoids corrupting the MakerNote: * extract and delete methods for EXIF thumbnails (both, JPEG and TIFF thumbnails) * set methods for EXIF thumbnails (JPEG only, TIFF thumbnails can be set from individual tags) * complete API documentation (by Doxygen) * generic lower-level classes to access IFD (Image File Directory) data structures