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JPEG2000 - перевод на Английский
![Comparison of JPEG, JPEG 2000, [[JPEG XR]], and [[HEIF]] at similar file sizes.](https://commons.wikimedia.org/wiki/Special:FilePath/Comparison between JPEG, JPEG 2000, JPEG XR and HEIF.png?width=200 "Comparison of JPEG, JPEG 2000, [[JPEG XR]], and [[HEIF]] at similar file sizes.")
![An example of the wavelet transform that is used in JPEG 2000. This is a 2nd-level CDF 9/7 [[wavelet transform]].](https://commons.wikimedia.org/wiki/Special:FilePath/Jpeg2000 2-level wavelet transform-lichtenstein.png?width=200 "An example of the wavelet transform that is used in JPEG 2000. This is a 2nd-level CDF 9/7 [[wavelet transform]].")
![CDF]] 5/3 wavelet used for lossless compression](https://commons.wikimedia.org/wiki/Special:FilePath/Wavelet Bior2.2.svg?width=200 "CDF]] 5/3 wavelet used for lossless compression")
общая лексика
стандарт JPEG2000
новая открытая версия стандарта JPEG. Позволяет сжимать изображение в 200 раз. Использует алгоритм волнового преобразования, а не DCT. Изображение описывается математически как непрерывный поток
Определение
Википедия
JPEG 2000 (JP2) is an image compression standard and coding system. It was developed from 1997 to 2000 by a Joint Photographic Experts Group committee chaired by Touradj Ebrahimi (later the JPEG president), with the intention of superseding their original JPEG standard (created in 1992), which is based on a discrete cosine transform (DCT), with a newly designed, wavelet-based method. The standardized filename extension is .jp2 for ISO/IEC 15444-1 conforming files and .jpx for the extended part-2 specifications, published as ISO/IEC 15444-2. The registered MIME types are defined in RFC 3745. For ISO/IEC 15444-1 it is image/jp2.
JPEG 2000 code streams are regions of interest that offer several mechanisms to support spatial random access or region of interest access at varying degrees of granularity. It is possible to store different parts of the same picture using different quality.
JPEG 2000 is a compression standard based on a discrete wavelet transform (DWT). The standard could be adapted for motion imaging video compression with the Motion JPEG 2000 extension. JPEG 2000 technology was selected as the video coding standard for digital cinema in 2004. However, JPEG 2000 is still not widely supported in web browsers (other than Safari) as of 2022, and hence is not generally used on the World Wide Web.
