Lossless JPEG

Lossless JPEG is an ambiguous term, which may refer to:

• The standard lossless modes of the original JPEG format
• The JPEG-LS format (which supports both lossless and lossy compression)
• Sometimes, lossless JPEG formats are confused with lossless JPEG transformations. A lossless JPEG transformation is not a format; it refers to the process of editing (e.g. rotating or cropping) a lossy JPEG image without causing any additional loss of image quality.

Less-likely things it could mean:

• Only the lossless form of JPEG-LS
• The nonstandard SmartScale features promoted by the IJG libjpeg software, when used to achieve lossless DCT compression
• The collection of all formats that are lossless and have JPEG in their name, which could include some forms of JPEG 2000 and JPEG XR

This disambiguation page lists articles associated with the term "Lossless JPEG".