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GraphicsAcademy.com > File Formats > Exchangeable Image File Format

Exif File Format

Short Name	Exif
Long Name	Exchangeable Image File Format
Typical File Extensions	.exf
Contains	Bitmap

Exif (despite being an acronynm it is usually written as "Exif" rather than "EXIF") is a file format developed by the Japan Electronic Industry Development Association (JEIDA) principally for use by digital cameras. The specification uses the JPEG, TIFF and RIFF formats, with the addition of metadata tags.

There are some issues with the Exif format, including:

If Exif files are read by programs other than the original manufacturer, their maybe metadata (data describing the image) which can not be read, and which becomes corrupt or lost if the file is then re-saved in Exif format.
The standard defines a markernote tag which manufacturers can use to store any data they wish in. As this tag is proprietary and manufacturer specific, it is difficult, if not impossible to read this information or preserve when re-saving the image.
Exif is limited to 24 bit color depth.
Exif has no provision for video.

As a result of these issues, the Exif standard is no longer officially maintained, and many manufacturers have departed from the standard.

Related Web Sites:

Exif
Unofficial site about the Exif standard.

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