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Difference between revisions of "JPEG"

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* [http://en.wikipedia.org/wiki/JPEG Wikipedia: JPEG]
 
* [http://en.wikipedia.org/wiki/JPEG Wikipedia: JPEG]
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* Article about [http://netzreport.googlepages.com/hidden_data_in_jpeg_files.html hidden data in JPEG files] (Exif, digital fingerprint)
  
 
[[Category:File Formats]]
 
[[Category:File Formats]]

Revision as of 16:03, 7 July 2006

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 FFd8 (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