The JPEG format is a "lossy" format, meaning that the image you get out of decompression isn't quite identical to what you originally put in. The algorithm achieves much of its compression by exploiting known limitations of the human eye, notably the fact that small color details aren't perceived as well as small details of light-and-dark. Thus, JPEG is intended for storing images that will be looked at by humans. If you plan to machine-analyze your images, the small errors introduced by JPEG may be a problem for you, even though they are invisible to the eye. This format is excellent for general image exchange.
The file extension recommended by the Joint Photographic Experts Group is JIF. Another commonly used extension is JPG, which is the default.
Supporting Platforms and Applications
This format is supported by numerous applications on a wide range of platforms.
· Support in accordance with the Independent JPEG Group's revision 6a.
· The JPEG codec included in this software is based in part on the work of the Independent JPEG Group.