Background
The Japan Electronic Industries Development Association (JEIDA) produced the initial definition of Exif. Version 2.1 of the specification is dated June 12, 1998. JEITA established version 2.2 in April 2002.. The latest, version 2.3 dated April 2010, was jointly formulated by JEITA and CIPA. Though the specification is not currently maintained by any industry or standards organization, almost all camera manufacturers use it.
The metadata tags defined in the Exif standard cover a broad spectrum:
- Date and time information. Digital cameras will record the current date and time and save this in the metadata.
- 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
- Copyright information.
Read more about this topic: Exchangeable Image File Format
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