JPEG

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The Joint Photographic Experts Group (JPEG) format is a commonly-used lossy image format.


Format

JPEG is a container file format that consist of a well defined header, some metadata,icons, a color table, compressed data, and a well defined footer. The header is usually FF D8 (hex).

Common file extensions are .jpg, .jpeg, .JPG, .JPE, and .jfif.

Metadata

JPEG files can contain lots of metadata in several formats: Exif, IPTC, GPS, Camera Raw etc. The exif and jhead command tools can extract and manipulate some of that metadata.

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