Image Compression: Seeing What's Not There

In this article, we'll study the JPEG baseline compression algorithm using the image on the right as an example. (JPEG is an acronym for "Joint Photographic Experts Group.") Some compression algorithms are lossless for they preserve all the original information. Others, such as the JPEG baseline algorithm, are lossy--some of the information is lost, but only information that is judged to be insignificant.

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