Oldest known version of this page was edited on 2005-06-03 23:00:31 by YanB [translation done]
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Joint Photographic Expert Group (JPEG)
JPEG is one of the most efficient picture compression formats currently available. This open format is very light and allows you to determine the rate of data compression, knowing that the higher the compression rate, the lower the quality of the picture. JPEG follows a process of cumulative compression: the image is clearly affected if you open it and save it with a new compression rate.
A variant of this format, progressive JPEG, allows you to optimise the time it takes to display the picture on internet. The new JPEG_2000 standard, currently being defined, will allow for a better quality/compression ratio as well as the indexing of pictures with keywords.
Joint Photographic Expert Group∞
W3: JPEG Overview and Specifications∞
JPEG 2000 Overview and Specifications∞
