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Exchangeable image file format (EXIF) is a specification that defines data pertaining to images, sounds and tags used in digital still cameras.
EXIF was conceived by the Japan Electronics Industries Development Association (JEIDA) to support and standardize the type of information stored by a digital camera.
An extension of the Joint Photographic Experts Group (JPEG) image format, EXIF maintains the metadata for images and/or sounds that are captured or recorded from a digital camera. Relevant nformation, which varies by camera vendor, may include the date, time, location, focal length, compensation, camera settings and copyright. This information is essential for photographers and applications that work with or process these digital images, facilitating the evaluation of image quality.
EXIF is also processed by other devices that work on digital images, such as printers and scanners.