| Stands 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. |
