Jpeg2000 Tags

The tags below are found in JPEG 2000 images and the C2PA CAI JUMBF metadata in various file types (see below). Note that ExifTool currently writes only EXIF, IPTC and XMP tags in Jpeg2000 images, and EXIF and XMP in JXL images. ExifTool will read/write Brotli-compressed EXIF and XMP in JXL images, but the API Compress option must be set to create new EXIF and XMP in compressed format.

C2PA (Coalition for Content Provenance and Authenticity) CAI (Content Authenticity Initiative) JUMBF (JPEG Universal Metadata Box Format) metdata is currently extracted from JPEG, PNG, TIFF-based (eg. TIFF, DNG), QuickTime-based (eg. MP4, MOV, HEIF, AVIF), RIFF-based (eg. WAV, AVI, WebP), PDF, SVG and GIF files, and ID3v2 metadata. The suggested ExifTool command-line arguments for reading C2PA metadata are -jumbf:all -G3 -b -j -u -struct. This metadata may be deleted from writable JPEG, PNG, WebP, TIFF-based, and QuickTime-based files by deleting the JUMBF group with -jumbf:all=. The C2PA JUMBF metadata may be extracted as a block via the JUMBF tag. See https://c2pa.org/specifications/ for the C2PA specification.

Tag IDTag Name WritableValues / Notes
'Exif' EXIF - --> EXIF Tags
'asoc' Association - --> Jpeg2000 Tags
'bfdb' BinaryDataType no (JUMBF, MIME type and optional file name)
'bfil' BinaryFilter no  
'bidb' BinaryData no (JUMBF)
'bpcc' BitsPerComponent no  
'brob' BrotliXMP
BrotliEXIF
BrotliJUMB
-
-
-
--> XMP Tags
--> EXIF Tags
--> Jpeg2000 Tags
'c2sh' C2PASaltHash no  
'cbor' CBORData - --> CBOR Tags
'cdef' ComponentDefinition no  
'cgrp' ColorGroup no  
'chck' DigitalSignature no  
'cmap' ComponentMapping no  
'colr' ColorSpecification - --> Jpeg2000 ColorSpec Tags
'comp' Composition no  
'copt' CompositionOptions no  
'cref' Cross-Reference no  
'creg' CodestreamRegistration no  
'drep' DesiredReproductions no  
'dtbl' DataReference no  
'flst' FragmentList no  
'free' Free no  
'ftbl' FragmentTable no  
'ftyp' FileType - --> Jpeg2000 FileType Tags
'gtso' GraphicsTechnologyStandardOutput no  
'hrgm' GainMapImage no  
'ihdr' ImageHeader - --> Jpeg2000 ImageHeader Tags
'inst' InstructionSet no  
'jP ' JP2Signature no  
'jp2c' ContiguousCodestream
PreviewImage
no
no
 
'jp2h' JP2Header - --> Jpeg2000 Tags
'jp2i' IntellectualProperty - --> XMP Tags
'jpch' CodestreamHeader - --> Jpeg2000 Tags
'jplh' CompositingLayerHeader - --> Jpeg2000 Tags
'json' JSONData - --> JSON Tags
(by default, data in this tag is parsed using the ExifTool JSON module to to allow individual tags to be accessed when reading, but it may also be extracted as a block via the "JSONData" tag or by setting the API BlockExtract option)
'jumb' JUMBFBox - --> Jpeg2000 Tags
'jumd' JUMBFDescr - --> Jpeg2000 JUMD Tags
'jxlc' JXLCodestream no (Codestream in JPEG XL image. Currently processed only to determine ImageSize)
'jxlp' PartialJXLCodestream no (Partial codestreams in JPEG XL image. Currently processed only to determine ImageSize)
'lbl ' Label no  
'mdat' MediaData no  
'mp7b' MPEG7Binary no  
'nlst' NumberList no  
'opct' Opacity no  
'pclr' Palette no  
'prfl' Profile no  
'res ' Resolution - --> Jpeg2000 Tags
'resc' CaptureResolution - --> Jpeg2000 CaptureResolution Tags
'resd' DisplayResolution - --> Jpeg2000 DisplayResolution Tags
'roid' ROIDescription no  
'rreq' ReaderRequirements no  
'uinf' UUIDInfo - --> Jpeg2000 Tags
'ulst' UUIDList no  
'url ' URL no  
'uuid' UUID-EXIF
UUID-EXIF2
UUID-EXIF_bad
UUID-IPTC
UUID-IPTC2
UUID-XMP
UUID-GeoJP2
UUID-Photoshop
UUID-C2PAClaimSignature
UUID-Signature
UUID-Unknown
-
-
-
-
-
-
-
-
-
no
no
--> EXIF Tags
--> EXIF Tags
--> EXIF Tags
--> IPTC Tags
--> IPTC Tags
--> XMP Tags
--> EXIF Tags
--> Photoshop Tags
--> CBOR Tags
'xml ' XML
XMP
undef!+
-
(by default, the XML data in this tag is parsed using the ExifTool XMP module to to allow individual tags to be accessed when reading, but it may also be extracted as a block via the "XML" tag, which is also how this tag is written and copied. It may also be extracted as a block by setting the API BlockExtract option. This is a List-type tag because multiple XML blocks may exist)
--> XMP XML Tags
(used for XMP in JPEG XL files)
--> XMP Tags

Jpeg2000 ColorSpec Tags

The table below contains tags in the color specification (colr) box. This box may be rewritten by writing either ICC_Profile, ColorSpace or ColorSpecData. When writing, any existing colr boxes are replaced with the newly created colr box.

NOTE: Care must be taken when writing this color specification because writing a specification that is incompatible with the image data may make the image undisplayable.

Index1Tag Name WritableValues / Notes
0 ColorSpecMethod int8s! (default for writing is 2 when writing ICC_Profile, 1 when writing ColorSpace, or 4 when writing ColorSpecData)
1 = Enumerated
2 = Restricted ICC
3 = Any ICC
4 = Vendor Color
1 ColorSpecPrecedence int8s! (default for writing is 0)
2 ColorSpecApproximation int8s! (default for writing is 0)
0 = Not Specified
1 = Accurate
2 = Exceptional Quality
3 = Reasonable Quality
4 = Poor Quality
3 ICC_Profile
ColorSpace
ColorSpecData
-
int32u!
undef[$size-3]!
--> ICC_Profile Tags
0 = Bi-level
1 = YCbCr(1)
3 = YCbCr(2)
4 = YCbCr(3)
9 = PhotoYCC
11 = CMY
12 = CMYK
13 = YCCK
14 = CIELab
15 = Bi-level(2)
   16 = sRGB
17 = Grayscale
18 = sYCC
19 = CIEJab
20 = e-sRGB
21 = ROMM-RGB
22 = YPbPr(1125/60)
23 = YPbPr(1250/50)
24 = e-sYCC

Jpeg2000 FileType Tags

Index4Tag Name WritableValues / Notes
0 MajorBrand no 'jp2 ' = JPEG 2000 Image (.JP2)
'jph ' = High-throughput JPEG 2000 (.JPH)
'jpm ' = JPEG 2000 Compound Image (.JPM)
'jpx ' = JPEG 2000 with extensions (.JPX)
'jxl ' = JPEG XL Image (.JXL)
1 MinorVersion no  
2 CompatibleBrands no+  

Jpeg2000 ImageHeader Tags

Index1Tag Name WritableValues / Notes
0 ImageHeight no  
4 ImageWidth no  
8 NumberOfComponents no  
10 BitsPerComponent no  
11 Compression no
0 = Uncompressed
1 = Modified Huffman
2 = Modified READ
3 = Modified Modified READ
4 = JBIG
5 = JPEG
6 = JPEG-LS
7 = JPEG 2000
8 = JBIG2

Jpeg2000 JUMD Tags

Information extracted from the JUMBF description box.

Tag IDTag Name WritableValues / Notes
'id' JUMDID no  
'label' JUMDLabel no  
'sig' JUMDSignature no  
'toggles' JUMDToggles? no Bit 0 = Requestable
Bit 1 = Label
Bit 2 = ID
Bit 3 = Signature
'type' JUMDType no  

Jpeg2000 CaptureResolution Tags

Index1Tag Name WritableValues / Notes
0 CaptureYResolution no  
4 CaptureXResolution no  
8 CaptureYResolutionUnit no --> Jpeg2000 ResolutionUnit Values
9 CaptureXResolutionUnit no --> Jpeg2000 ResolutionUnit Values

Jpeg2000 ResolutionUnit Values

ValueResolutionUnitValueResolutionUnitValueResolutionUnit
-3= km 1= 10 cm 5= 0.01 mm
-2= 100 m 2= cm 6= um
-1= 10 m 3= mm   
0= m 4= 0.1 mm   

Jpeg2000 DisplayResolution Tags

Index1Tag Name WritableValues / Notes
0 DisplayYResolution no  
4 DisplayXResolution no  
8 DisplayYResolutionUnit no --> Jpeg2000 ResolutionUnit Values
9 DisplayXResolutionUnit no --> Jpeg2000 ResolutionUnit Values

(This document generated automatically by Image::ExifTool::BuildTagLookup)
Last revised Oct 2, 2024

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