Description:

Jhead is a command line driven utility for extracting digital camera
settings from the Exif format files used by many digital cameras. It
handles the various confusing ways these can be expressed, and
displays them as F-stop, shutter speed, etc. It is also able to reduce
the size of digital camera JPEGs without loss of information, by
deleting integral thumbnails that digital cameras put into the Exif
header. If you need to add Exif support to a program, this is a simple
program to cut and paste from. Many projects, including PHP, have
reused code from this utility.