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 ID Tag Name Writable Values / 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.

Index1 Tag Name Writable Values / 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

Index4 Tag Name Writable Values / 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

Index1 Tag Name Writable Values / 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 ID Tag Name Writable Values / 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

Index1 Tag Name Writable Values / Notes 0 CaptureYResolution no   4 CaptureXResolution no   8 CaptureYResolutionUnit no --> Jpeg2000 ResolutionUnit Values 9 CaptureXResolutionUnit no --> Jpeg2000 ResolutionUnit Values

Jpeg2000 ResolutionUnit Values

Value ResolutionUnit Value ResolutionUnit Value ResolutionUnit -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

Index1 Tag Name Writable Values / Notes 0 DisplayYResolution no   4 DisplayXResolution no   8 DisplayYResolutionUnit no --> Jpeg2000 ResolutionUnit Values 9 DisplayXResolutionUnit no --> Jpeg2000 ResolutionUnit Values

<-- ExifTool Tag Names