Exchangeable Image File Format or simply EXIF is a specification for the image file format used by digital cameras. EXIF is a standard for storing or interchanging information in image files, especially those using JPEG compression. Most digital cameras now support EXIF. The standard is part of the DCF standard created by JEITA to encourage interoperability between imaging devices.

What is the significance of EXIF?

The metadata tags used in the EXIF info relates to all the information you need to know about a photo that was clicked. It covers a broad spectrum:

• Date and time when the image was clicked.

• Camera settings: This includes static information such as the camera model and make, and information that varies with each image such as orientation (rotation), aperture, shutter speed, focal length, metering mode, and ISO speed information.

• A thumbnail for previewing the picture on the camera's LCD screen, in file managers, or in photo manipulation software.

• Descriptions and copyright information.

• Geolocation : The EXIF format has standard tags for location information. Currently, only very few cameras have a built-in GPS receiver and store the location information in the EXIF header when the picture is taken.

How to view the EXIF of a picture?

• Windows:

EXIF information may be viewed by right clicking on an image file and clicking properties; from the properties dialog click the Summary tab and then the Advanced button.