If you are interested in digital photography, there is a good chance that you will be interested in the Exif information for the photograph. It would be nice to get a tool that allows you the facility of reading, writing and editing meta-information in various files, whether they be image files, audio files or video files.
One tool that can do just that is ExifTool (click to visit site). It has the following features:
ExifTool supports many different types of metadata including EXIF, GPS, IPTC, XMP, JFIF, GeoTIFF, ICC Profile, Photoshop IRB, FlashPix, AFCP and ID3, as well as the maker notes of many digital cameras by Canon, Casio, FujiFilm, HP, JVC/Victor, Kodak, Leaf, Minolta/Konica-Minolta, Nikon, Olympus/Epson, Panasonic/Leica, Pentax/Asahi, Ricoh, Sanyo, Sigma/Foveon and Sony.
It works on both Windows and Mac. Essentially, ExifTool is a Perl library along with a command line application. Other features are:
- Shifts date/time values to fix timestamps in images
- Renames files and organizes in directories (by date or by any other meta information)
- Extracts thumbnail images, preview images, and large JPEG images from RAW files
- Copies meta information between files (even different-format files)
- Deletes meta information individually, in groups, or altogether
- Sets the file modification date from EXIF information
- Processes entire directory trees
- Creates text output file for each image file
- Automatically backs up original image when writing
- Organizes output into groups
- Conditionally processes files based on value of any meta information
- Ability to add user-defined tags
- Recognizes thousands of different tags
- Tested with images from thousands of different camera models
- Advanced verbose and HTML-based hex dump outputs
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