JPEG Club
An organization (or individual?) that provides improvements to jpeg manipulation tools, such as tweaking the ILJ 'cjpeg' compressor to allow different compression quality settings on different channels.
An organization (or individual?) that provides improvements to jpeg manipulation tools, such as tweaking the ILJ 'cjpeg' compressor to allow different compression quality settings on different channels.
A good non-mathematically introduction to the technical aspects of JPEG compression, with lots of illustrations of what different settings do to images.
dead link: http://www.photo.net/learn/jpeg/
The comp.graphics.misc frequently asked questions list, with answers, about JPEG compression and JFIF files. Last modified in 1999, some of the questions are quite dated, but many are still relevant.
The W3C page on the image/jpeg file format is brief, but it has links to two PDF files documenting the JPEG FIle Format, the standard way to contain images compressed with the JPEG mechanism.