JPEG-LS
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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. The compression algorithm is based on 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 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.
