中文说明：
JPEG 2000是基于小波变换的图像压缩标准，由Joint Photographic Experts Group组织创建和维护。JPEG 2000通常被认为是未来取代JPEG（基于离散余弦变换）的下一代图像压缩标准。JPEG 2000文件的副档名通常为.jp2，MIME类型是image/jp2。 JPEG 2000的压缩比更高，而且不会产生原先的基于离散余弦变换的JPEG标准产生的块状模糊瑕疵。JPEG 2000同时支持有损数据压缩和无损数据压缩。另外，JPEG 2000也支持更复杂的渐进式显示和下载。 JPEG 2000是国际标准化组织（ISO）发布的标准，文档代码为ISO/IEC 15444-1：2000。虽然JPEG 2000在技术上有一定的优势，但是到目前为止（2006年），互联网上采用JPEG 2000技术制作的图像文件数量仍然很少，并且大多数的浏览器仍然不支持JPEG 2000图像文件的显示。但是，由于JPEG 2000在无损压缩下仍然能有比较好的压缩率，所以JPEG 2000在图像品质要求比较高的医学图像的分析和处理中已经有了一定程度的广泛应用。
English Description：
JPEG 2000 is an image compression standard based on wavelet transform, which is created and maintained by Joint Photographic Experts Group. JPEG 2000 is generally considered as the next generation of image compression standard to replace JPEG (based on discrete cosine transform) in the future. The sub file name of JPEG 2000 file is usually. JP2, and the MIME type is image / JP2. The compression ratio of JPEG 2000 is higher, and it will not produce the block blur defects of the original JPEG standard based on DCT. JPEG 2000 supports both lossy and lossless data compression. In addition, JPEG 2000 also supports more complex progressive display and download. JPEG 2000 is a standard issued by the international organization for Standardization (ISO). The document code is ISO / IEC 15444-1:2000. Although JPEG 2000 has some advantages in technology, so far (2006), the number of image files produced by using JPEG 2000 technology on the Internet is still very small, and most browsers still do not support the display of JPEG 2000 image files. However, JPEG 2000 has been widely used in the analysis and processing of medical images with high image quality requirements due to its good compression rate under lossless compression.