JOINT PHOTOGRAPHIC
EXPERTS GROUP (JPEG) - (Pronounced JAY-peg.)
A color - image graphics compression format named for
the committee that designed the standard image
compression algorithm. Using compression computer
files can be altered to take up less storage space.
In the JPEG image compression system, some data is
sacrificed to achieve high rates of compression.
Ratios of 100:1 or higher are possible, which means
that a 100MB graphics file could potentially be
reduced to 1MB in length. However, ratios over 10:1
or 20:1 , depending on the particular image, begin to
show noticeable image degradation. The more loss
tolerated, the more the image can be compressed
Compression is achieved by dividing the picture into
tiny pixel blocks, which are halved over and over
until the ratio is achieved. Supported by most World
Wide Web(WWW) browsing applications.
Here
are some example pictures:
sunset.jpg
(5kb)
mallard.jpg (7kb)
