Editing JPEG 2000 (section)

==File format and codestream==
Similar to JPEG-1, JPEG 2000 defines both a file format and a codestream. Whereas JPEG&nbsp;2000 entirely describes the image samples, JPEG-1 includes additional meta-information such as the resolution of the image or the color space that has been used to encode the image. JPEG&nbsp;2000 images should—if stored as files—be boxed in the JPEG&nbsp;2000 file format, where they get the '''.jp2''' extension. The part-2 extension to JPEG&nbsp;2000 (ISO/IEC 15444-2) enriches the file format by including mechanisms for animation or composition of several codestreams into one single image. This extended file format is called JPX, and should use the file extension '''.jpf''',<ref>{{Citation|title=ISO/IEC 15444-2 Information technology — JPEG 2000 image coding system: Extensions|publisher=[[ISO]]|date=2004-05-15}} (in Annex M, section M.2.1 File identification)</ref> although '''.jpx''' is also used.<ref>{{Cite web|url=https://www.loc.gov/preservation/digital/formats/fdd/fdd000154.shtml|title=JPEG 2000 Part 2 (Extensions) jpf (jpx) File Format|date=22 November 2022 |publisher=[[Library of Congress]]|access-date=20 July 2023}}</ref>

There is no standardized extension for codestream data because codestream data is not to be considered to be stored in files in the first place, though when done for testing purposes, the extension '''.jpc''', '''.j2k''' or '''.j2c''' is commonly used.