JPEG-LS
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== Overview == | == Overview == | ||
| − | '''JPEG-LS''' is an image compression scheme and file format. It supports both lossy and lossless compression. The lossy compression is often called "near-lossless", because the encoder can set a limit on the maximum error. | + | '''JPEG-LS''' is an image compression scheme and file format. It supports both lossy and lossless compression. The lossy compression is often called "near-lossless", because the encoder can set a limit on the maximum error. Its compression algorithm is [[LOCO-I]], developed by HP Labs. |
== Disambiguation == | == Disambiguation == | ||
The file format is similar in structure to [[JPEG]] interchange format, and it was developed by the same organization that developed JPEG. Beyond that, JPEG-LS is not closely related to JPEG. | The file format is similar in structure to [[JPEG]] interchange format, and it was developed by the same organization that developed JPEG. Beyond that, JPEG-LS is not closely related to JPEG. | ||
| − | The term '''lossless JPEG''' is best reserved for the [[JPEG#Lossless JPEG|lossless compression mode]] defined the JPEG standard, but it is sometimes (accidentally?) used to mean JPEG-LS, or lossless JPEG-LS, or ''all lossless formats whose names contain "JPEG"''. | + | The term '''lossless JPEG''' is best reserved for the [[JPEG#Lossless JPEG|lossless compression mode]] defined the JPEG standard, but it is sometimes (accidentally?) used to mean JPEG-LS, or lossless JPEG-LS, or perhaps even ''all lossless formats whose names contain "JPEG"''. |
== Related formats == | == Related formats == | ||
Revision as of 20:15, 3 March 2013
Contents[hide] |
Overview
JPEG-LS is an image compression scheme and file format. It supports both lossy and lossless compression. The lossy compression is often called "near-lossless", because the encoder can set a limit on the maximum error. Its compression algorithm is LOCO-I, developed by HP Labs.
Disambiguation
The file format is similar in structure to JPEG interchange format, and it was developed by the same organization that developed JPEG. Beyond that, JPEG-LS is not closely related to JPEG.
The term lossless JPEG is best reserved for the lossless compression mode defined the JPEG standard, but it is sometimes (accidentally?) used to mean JPEG-LS, or lossless JPEG-LS, or perhaps even all lossless formats whose names contain "JPEG".
Related formats
JPEG-LS compression can be used in some other file formats, such as JPX, JPM, SPIFF, and DICOM.
Specifications
Software
- CharLS - A C++ JPEG-LS library. Includes sample files.
