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.

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

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