Новинки:

Сайт подключен к Orphus. Если вы заметили опечатку, выделите слово и нажмите Ctrl+Enter. Спасибо!

Download: ресурсы по сжатию

Сжатие изображений без потерь:

LOCO (LOw COmplexity LOssless COmpression) и JPEG-LS


Английские материалы Исходные тексты компрессоров

Русские материалы
Авторы Название Описание Рейтинг


Английские материалы
ISO Lossless and near-lossless coding of continuous tone still images Последний черновик стандарта на JPEG-LS (CD 14495).
FCD 14495 -- public draft, 1997/7/16
PDF.RAR  307 кбайт
?
Weinberger M., Seroussi G., Sapiro G. LOCO-I: A Low Complexity, Context-Based, Lossless Image Compression Algorithm LOCO-I (LOw COmplexity LOssless COmpression for Images) is a novel lossless compression algorithm for continuous-tone images which combines the simplicity of Huffman coding with the compression potential of context models, thus "enjoying the best of both worlds." The algorithm is based on a simple fixed context model, which approaches the capability of the more complex universal context modeling techniques for capturing high-order dependencies...
Proceedings of the IEEE Data Compression Conference, Snowbird, Utah, April 1-3, 1996.
PDF.RAR  184 кбайт
?
Weinberger M., Seroussi G., Sapiro G. The LOCO-I Lossless Image Compression Algorithm: Principles and Standardization into JPEG-LS LOCO-I (LOw COmplexity LOssless COmpression for Images) is the algorithm at the core of the new ISO/ITU standard for lossless and near-lossless compression of continuous-tone images, JPEG-LS. It is conceived as a "low complexity projection" of the universal context modeling paradigm, matching its modeling unit to a simple coding unit... We discuss the principles underlying the design of LOCO-I, and its standardization into JPEG-LS.
Hewlett-Packard Laboratories technical report N193, 1998.
PDF.RAR  256 кбайт
PS.RAR    186 кбайт
?
Weinberger M., Seroussi G. From LOCO-I to the JPEG-LS Standard ...The JPEG-LS standard evolved after successive refinements of the core algorithm. This evolution, and the main algorithmic components of JPEG-LS are described in this paper...
Technical report HPL-1999-3, HP Laboratories Palo Alto, January, 1999.
PDF.RAR  354 кбайт
?


Исходные тексты компрессоров
University of British Columbia SPMG/JPEG-LS implementation Реализация стандарта JPEG-LS в соответствии с ISO/IEC JTC 1/SC 29/WG 1 (ITU-T SG8). Поддерживает как сжатие без потерь, так и сжатие "почти без потерь" (near lossless).
Signal Processing and Multimedia Group (SPMG), University of British Columbia, 1999.
Язык: C
Сайт проекта: http://www.ece.ubc.ca/spmg/
research/jpeg/jpeg_ls/jpegls.html

версия 2.2:
  без тестовой картинки и GUI-реализации  100 кбайт
  полная  854 кбайт
?

наверх