Image::images    Format::which    Standard::patent    Color::title    Quality::encoding    Right::patent

{{#invoke:Hatnote|hatnote}} {{#invoke:Infobox|infobox}}

JPEG ({{#invoke:IPAc-en|main}} JAY-peg)<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> is a commonly used method of lossy compression for digital images, particularly for those images produced by digital photography. The degree of compression can be adjusted, allowing a selectable tradeoff between storage size and image quality. JPEG typically achieves 10:1 compression with little perceptible loss in image quality.{{ safesubst:#invoke:Unsubst||date=__DATE__ |$B= {{#invoke:Category handler|main}}{{#invoke:Category handler|main}}[citation needed] }}

JPEG compression is used in a number of image file formats. JPEG/Exif is the most common image format used by digital cameras and other photographic image capture devices; along with JPEG/JFIF, it is the most common format for storing and transmitting photographic images on the World Wide Web.{{ safesubst:#invoke:Unsubst||date=__DATE__ |$B= {{#invoke:Category handler|main}}{{#invoke:Category handler|main}}[citation needed] }} These format variations are often not distinguished, and are simply called JPEG.

The term "JPEG" is an acronym for the Joint Photographic Experts Group, which created the standard. The MIME media type for JPEG is image/jpeg, except in older Internet Explorer versions, which provides a MIME type of image/pjpeg when uploading JPEG images.<ref>MIME Type Detection in Internet Explorer: Uploaded MIME Types (msdn.microsoft.com)</ref> JPEG files usually have a filename extension of .jpg or .jpeg.

JPEG/JFIF supports a maximum image size of 65,535×65,535 pixels,<ref>JPEG File Layout and Format</ref> hence up to 4 gigapixels (for an aspect ratio of 1:1).

JPEG sections
Intro  The JPEG standard  Typical usage  JPEG compression  JPEG files  Syntax and structure  JPEG codec example  Effects of JPEG compression  Lossless further compression  Derived formats for stereoscopic 3D  Patent issues  Standards   Implementations   See also  References  External links  

PREVIOUS: IntroNEXT: The JPEG standard