JPEG 2000 codestream
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| − | + | '''JPEG2000 codestream''' (also known as '''J2K''', '''J2C''', or '''JPEG 2000 Part 1, Core Coding System''') is the wavelet-based compressed image format defined in Part 1 of the [[JPEG2000]] standard. It may appear in a file by itself, or embedded in [[JP2]] or another file format. | |
| − | '''JPEG2000 codestream''' (also known as '''J2K''', '''J2C''', or '''JPEG 2000 Part 1, Core Coding System''') is the wavelet-based compressed image format defined | + | |
| − | + | == Format == | |
| + | A JPEG2000 codestream uses a variant of [[JPEG]] format, with the same system of markers and segments. (Note that the container formats used by JP2 and other JPEG2000 file formats are completely different.) | ||
| − | + | == Identifiers == | |
| + | There is no official filename extension, but '''.j2k''' and '''.j2c''' are commonly used. | ||
== Identification == | == Identification == | ||
Files start with bytes <code>ff 4f ff</code>. | Files start with bytes <code>ff 4f ff</code>. | ||
| + | |||
| + | == Specifications == | ||
| + | * ISO/IEC 15444-1 | ||
| + | * [http://www.itu.int/rec/T-REC-T.800/en ITU-T Rec.T.800]: JPEG 2000: Core coding system (not free to download) | ||
| + | * [http://www.jpeg.org/jpeg2000/CDs15444.html JPEG 2000 Committee Drafts] → [http://www.jpeg.org/public/fcd15444-1.pdf fcd15444-1.pdf] | ||
== Sample files == | == Sample files == | ||
* http://www.openjpeg.org/index.php?menu=samples | * http://www.openjpeg.org/index.php?menu=samples | ||
* http://www.opf-labs.org/format-corpus/jp2k-formats/balloon.j2c | * http://www.opf-labs.org/format-corpus/jp2k-formats/balloon.j2c | ||
| + | |||
| + | == Links == | ||
| + | * [[Wikipedia:JPEG 2000]] | ||
| + | * [http://www.jpeg.org/jpeg2000/ JPEG 2000 web site] | ||
| + | * [http://www.jpeg.org/jpeg2000/j2kpart1.html JPEG 2000 Part 1 web site] | ||
Revision as of 00:18, 28 July 2013
JPEG2000 codestream (also known as J2K, J2C, or JPEG 2000 Part 1, Core Coding System) is the wavelet-based compressed image format defined in Part 1 of the JPEG2000 standard. It may appear in a file by itself, or embedded in JP2 or another file format.
Contents |
Format
A JPEG2000 codestream uses a variant of JPEG format, with the same system of markers and segments. (Note that the container formats used by JP2 and other JPEG2000 file formats are completely different.)
Identifiers
There is no official filename extension, but .j2k and .j2c are commonly used.
Identification
Files start with bytes ff 4f ff.
Specifications
- ISO/IEC 15444-1
- ITU-T Rec.T.800: JPEG 2000: Core coding system (not free to download)
- JPEG 2000 Committee Drafts → fcd15444-1.pdf
Sample files
- http://www.openjpeg.org/index.php?menu=samples
- http://www.opf-labs.org/format-corpus/jp2k-formats/balloon.j2c
