Difference between revisions of "JPEG"

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= 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 <tt>FF D8</tt> (hex).
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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 <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.
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= Metadata =
 
= Metadata =
  
JPEG files can contain lots of [[metadata]] in several formats: [[Exif]], [[IPTC]], GPS, [[Camera Raw]] etc.
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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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The [[exif]] and [[jhead]] command tools can extract and manipulate some of that metadata.
  
 
= Externals Links =
 
= Externals Links =

Revision as of 07:54, 4 September 2008

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.

Externals Links