JPEG-LS

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Revision as of 21:26, 25 March 2013

File Format
Name JPEG-LS
Ontology
Extension(s) .jls
LoCFDD fdd000151
PRONOM fmt/150
Released 1998

Contents

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.

External links

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