JPEG-LS

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== Software ==
 
== Software ==
 
* [http://charls.codeplex.com/ CharLS]: A C++ JPEG-LS library. Includes sample files.
 
* [http://charls.codeplex.com/ CharLS]: A C++ JPEG-LS library. Includes sample files.
 +
* [https://github.com/thorfdbg/libjpeg Thomas Richter's libjpeg]
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* [http://www.stat.columbia.edu/~jakulin/jpeg-ls/mirror.htm UBC JPEG-LS Codec]
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* [http://www.xnview.com/ XnView]
  
 
== External links ==
 
== External links ==
 
* [http://www.hpl.hp.com/loco/ HP Labs LOCO-I/JPEG-LS Home Page]
 
* [http://www.hpl.hp.com/loco/ HP Labs LOCO-I/JPEG-LS Home Page]
 
* [http://en.wikipedia.org/wiki/Lossless_JPEG#JPEG-LS Wikipedia article]
 
* [http://en.wikipedia.org/wiki/Lossless_JPEG#JPEG-LS Wikipedia article]

Revision as of 23:53, 23 August 2013

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

JPEG-LS is an image file format and compressed data 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.

Contents

Disambiguation

JPEG-LS files are similar in structure to JPEG, but for all practical purposes, JPEG-LS is a separate and incompatible format.

Beware of documents which confuse the term "JPEG-LS" with the term "Lossless JPEG". See Lossless JPEG for more information.

Identification

Like JPEG, JPEG-LS files begin with bytes FF D8 FF.

A JPEG-LS file will contain an 0xF7 ("SOF55" or "JPG7") segment somewhere in it. Often, the 4th byte in the file is 0xF7.

Related formats

JPEG-LS compression can be used in some other file formats, such as JPX, JPM, SPIFF, and DICOM.

Specifications

Software

External links

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