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for Joint Photographics Experts Group, it's often
used to put photos up on the web. You can tell what
files are using it by the fact they use an address
that ends in .jpg (butterfly.jpg).
JPEG (usually
pronounced JAY-pehg) is also a term for any graphic
image file produced by using a JPEG standard. A JPEG
file is created by choosing from a range of
compression qualities (actually, from one of a suite
of compression algorithms). When you create a JPEG
or convert an image from another format to a JPEG,
you are asked to specify the quality of image you
want. Since the highest quality results in the
largest file, you can make a trade-off between image
quality and file size. Formally, the JPEG file
format is specified in ISO standard 10918. The JPEG
scheme includes 29 distinct coding processes
although a JPEG implementor may not use them all.
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