JPEG

Also known as continuous-tone still image encoding, continuous-tone still image decoding, JPG, .jpeg, .jpg, Joint Photographic Experts Group, JPEG 1

thumb|Continuously varied JPEG compression (between Q=100 and Q=1) for an abdominal [[CT scan]]

AI overview

JPEG is a file format that compresses images to make them smaller and easier to store or share, with the ability to adjust how much quality you're willing to sacrifice for smaller file sizes. It matters because it's widely used for photographs and images on the internet, allowing people to balance image quality against practical storage and transmission needs.

AI-generated from the Wikipedia summary — may contain errors.

Key facts

File format.name: JPEG Multi-Picture
File format.logo: JPEG format logo.svg
File format.screenshot: border|200px
File format.caption: A photo of a European wildcat with the compression rate, and associated losses, decreasing from left to right
File format.extension: , , , ,
File format.mime: hide
File format.uniform type: public.mpo-image
File format.compression: Id
File format.owner: Joint Photographic Experts Group, IBM, Mitsubishi Electric, AT&T, Canon Inc.
File format.genre: Lossy image compression format
File format.extended to: JPEG 2000
File format.standard: ISO/IEC 10918, ITU-T T.81, ITU-T T.83, ITU-T T.84, ITU-T T.86

via Wikipedia infobox

Wikidata facts

Official website: jpeg.org/jpeg

Show 4 more facts

Stack Exchange tag: stackoverflow.com/tags/jpeg
media type: image/jpeg
exact match: rs.tdwg.org/format/values/m008
Commons category: JPEG

Sources (3)

via Wikidata · CC0

~68 min read

Article

37 sections

Contents

History
Background
JPEG standard
Patent controversy
Typical use
JPEG compression
Lossless editing
JPEG files
JPEG filename extensions
Color profile
Syntax and structure
JPEG codec example
Encoding
Color space transformation
Downsampling
Block splitting
Discrete cosine transform
Quantization
Entropy coding
Compression ratio and artifacts
Decoding
Required precision
Effects of JPEG compression
Sample photographs
Lossless further compression
Derived formats for stereoscopic 3D
JPEG Stereoscopic
JPEG Multi-Picture Format
Implementations
Successors
JPEG LS
JPEG 2000
JPEG XT
JPEG XL
See also
References
External links

thumb|Continuously varied JPEG compression (between Q=100 and Q=1) for an abdominal [[CT scan]]

JPEG ( , short for Joint Photographic Experts Group and sometimes retroactively referred to as JPEG 1) 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 trade off between storage size and image quality. JPEG typically achieves 10:1 compression with a loss in image quality that, while perceptible, is widely agreed upon to be acceptable. Since its introduction in 1992, JPEG has been the most widely used image compression standard in the world, and the most widely used digital image format, with several billion JPEG images produced every day as of 2015.