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JPEG ( / ˈ dʒ eɪ p ɛ ɡ / JAY -peg ) 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.
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 . These format variations are often not distinguished, and are simply called JPEG.
The term "JPEG" is an abbreviation 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. JPEG files usually have a filename extension of .jpg or .jpeg .