Part of the Multimedia and graphics glossary:

A progressive JPEG is the JPEG equivalent of the interlaced GIF Graphics Interchange Format . It's an image created using the JPEG suite of compression algorithms that will "fade in" in successive waves of lines until the entire image has completely arrived. Like the interlaced GIF, a progressive JPEG is a more appealing way to deliver an image at modem connection speeds. Users with faster connections are not likely to notice the difference.

This was last updated in April 2005
Posted by: Margaret Rouse

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