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Difference between revisions of "JPEG"

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== Format ==
 
== Format ==
  
JPEG files consist of a well defined [[header]], some [[metadata]], and a well defined [[footer]]. The header is usually <tt>FFd8</tt> (hex).
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JPEG files consist of a well defined [[header]], some [[metadata]], and a well defined [[footer]]. The header is usually <tt>FF D8</tt> (hex).
  
 
Common file extensions are .jpg, .jpeg, .JPG, .JPE, and .jfif.
 
Common file extensions are .jpg, .jpeg, .JPG, .JPE, and .jfif.

Revision as of 21:47, 23 January 2007

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

Format

JPEG files consist of a well defined header, some metadata, 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 Exif format. The jhead command line tool can be used to extract that metadata.

Externals Links