JPEG File Interchange Format

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The JPEG File Interchange Format is an image file format standard. It is a format for exchanging JPEG encoded files compliant with the JPEG Interchange Format standard. It solves some of JIF's limitations in regard to simple JPEG encoded file interchange. As with all JIF compliant files, image data in JFIF files is compressed using the techniques in the JPEG standard, hence JFIF is sometimes referred to as "JPEG/JFIF". JPEG allows multiple components to have different resolutions, but it does not define how those differing sample arrays should be aligned. The JFIF standard requires samples to be sited "interstitially" meaning the decoder can treat each component array as representing an array of equal-sized rectangular pixels sampled in their centers, with each array having the same exterior boundaries as the image.