Jhead 2.7

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.
Jhead project 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.
Things jhead can extract from an Exif jpeg file:
- Integral low-res Exif thumbnail
- Shutter speed
- Camera F-stop number
- Flash used (yes/no)
- Distance camera was focused at
- Focal length and calculate 35 mm equivalent focal length
- Image resolution
- Time and date picture was taken
- Camera make and model
Things jhead can modify in an exif jpeg file:
- Up-right images according to rotation tag using jpegtran
- Set or relative adjust internal exif timestamps
- Re-name or date stamp fils according to exif timestamp
- Transfer exif headers between images
- Edit jpeg comments
- Delete exif or comment sections from jpeg images
Enhancements:
- The "-mkexif" option to create a new minimal EXIF section in an existing image was added.
- The "-ds" and "-dsft" options to manipulate the EXIF date and time were added.
- Image and thumbnail rotation flag handling was fixed.