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.

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

Metadata

JPEG files can contain lots of metadata in several formats, such as Exif, IPTC, GPS, or Camera Raw.

The exif and jhead command tools can extract and manipulate some of that metadata. Adroit Photo Forensics can be used to extract, view and group metadata from JPEG and camera Raw files.

Also see

• exif

Externals Links

• JPEG File Interchange Format Version 1.02
• Adobe: XMP Specification
• Extensible Metadata Platform (XMP)
• FlashPix Tags
• ISO/IEC 10918-1, Section: Annex B contains a detailed description of the JPEG file structure.
• Wikipedia: ICC profile
• Wikipedia: JPEG