The JPEG standard specifies the codec, which defines how an image is compressed into a stream of bytes and decompressed back into an image.
JPEG is a commonly used method of lossy compression for digital images, particularly for those images produced by digital photography. JPEG compression is used in image file formats and is the most common image format used by digital cameras and other photographic image capture devices.
The term "JPEG" is an acronym for the Joint Photographic Experts Group, which created the standard. The most common filename extensions for files employing JPEG compression are .jpg and .jpeg.
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