JPEG

Lossy compression method for reducing the size of digital images / From Wikipedia, the free encyclopedia

Dear Wikiwand AI, let's keep it short by simply answering these key questions:

Can you list the top facts and stats about JPEG?

Summarize this article for a 10 years old

SHOW ALL QUESTIONS

JPEG (/ˈpɛɡ/ JAY-peg, short for Joint Photographic Experts Group)[2] 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.[3] Since its introduction in 1992, JPEG has been the most widely used image compression standard in the world,[4][5] and the most widely used digital image format, with several billion JPEG images produced every day as of 2015.[6]

Quick facts: Filename extension, Internet media type,...
JPEG
Joint_Photographic_Experts_Group_logo.svg
Felis_silvestris_silvestris_small_gradual_decrease_of_quality.png
A photo of a European wildcat with the compression rate decreasing and hence quality increasing, from left to right
Filename extension
.jpg, .jpeg, .jpe
.jif, .jfif, .jfi
Internet media type
image/jpeg
Type codeJPEG
Uniform Type Identifier (UTI)public.jpeg
Magic numberff d8 ff
Developed byJoint Photographic Experts Group, IBM, Mitsubishi Electric, AT&T, Canon Inc.[1]
Initial releaseSeptember 18, 1992; 30 years ago (1992-09-18)
Type of formatLossy image compression format
Extended toJPEG 2000
StandardISO/IEC 10918, ITU-T T.81, ITU-T T.83, ITU-T T.84, ITU-T T.86
Websitejpeg.org/jpeg/ Edit this at Wikidata
Close
Continuously varied JPEG compression (between Q=100 and Q=1) for an abdominal CT scan

The term "JPEG" is an acronym for the Joint Photographic Experts Group, which created the standard in 1992.[7] JPEG was largely responsible for the proliferation of digital images and digital photos across the Internet and later social media.[8]

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.[9] These format variations are often not distinguished and are simply called JPEG.

The MIME media type for JPEG is "image/jpeg," except in older Internet Explorer versions, which provide a MIME type of "image/pjpeg" when uploading JPEG images.[10] JPEG files usually have a filename extension of "jpg" or "jpeg." JPEG/JFIF supports a maximum image size of 65,535×65,535 pixels,[11] hence up to 4 gigapixels for an aspect ratio of 1:1. In 2000, the JPEG group introduced a format intended to be a successor, JPEG 2000, but it was unable to replace the original JPEG as the dominant image standard.[12]