A joint ISO/CCITT committee known as JPEG( Joint Photographic Experts Group ) established the first international compression standard for continuous-tone still images. Their recommended standard forms the basics of the worldwide still image compression scheme popularly known as JPEG.

To meet differing needs of many applications the JPEG standard standard includes two basic compression methods: A DCT based lossy compression and a Predictive methord lossless compression. This also features a simple lossy technique known as baseline methord , which has been by far the most widely implemented and is the basics of discussion of this web site.

The best known standard from JPEG is IS 10918-1 (ITU-T T.81), which is the first of a multi-part set of standards for still image compression.

One of the important feature is that the degree of lossiness during JPEG compression can be varied by adjusting compression parameters. This means that the user can trade off file size against output image quality while compressing. Extremely small files can be generated with a small tradeoff to image quality. Again decoders can trade off decoding speed against image quality, by using fast but inaccurate approximations to the required calculations. Some viewers obtain remarkable speedups in this way.

This site has been designed to improve your knowledge of the JPEG standard through different papers, literatures, links, examples and working demonstrations.

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