So called exif metadata – or exif data – is automatically added to photos taken by digital cameras. The data that is added to the photo depends largely on the digital camera used but it usually includes information such as the time and date the photo was taken, the camera model, resolution and other technical information. They also contain preview thumbnails of the photos in their header. The information contained in the exif header can pose a privacy risk. Think of cutting an image but keeping the exif data of the original image. The thumbnail image could show more of a photo than desired.
Exif data can also contain comments and other information that many users might not want to distribute with their photos.
Jhead is a command line application that can display the contents of the exif file for one or multiple jpeg images. More powerful than revealing the contents of the exif data is the use as an exif metadata editor. Jhead can edit, add and remove data from selected jpeg photos easily. The huge list of commands is available at the developer’s website. It ranges from replacing exif data with data from another photo, manipulating date, time, thumbnails and general data.
The default command jhead filename will output the exif metadata of the selected file or files (wildcards are possible, e.g. jhead *.jpg) in the command line
Jhead is available for Microsoft Windows and Linux operating systems. It can be downloaded from the developer’s website.
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If you’re looking for tools to manipulate photo metadata, you also might be interested in ExifTool by Phil Harvey (http://www.sno.phy.queensu.ca/~phil/exiftool/). The advantage to his tool is that it has been around long enough that other tools have been build on top of it, like the ExifToolGUI for Windows (http://freeweb.siol.net/hrastni3/foto/exif/exiftoolgui.htm).
is there any commandline tool which can add title, desc, author, etc.? jhead or exif tool can’t do that.