Format
Digital Negative Format (DNG)
Summary
- Name
- Digital Negative Format (DNG)
- Version
- 1.0
- Identifiers
-
- PUID: fmt/436
- MIME: image/tiff
- Format type
- Image (Raster)
- Disclosure
- Full
- Description
- The Digital Negative (DNG) Specification describes a non-proprietary file format for storing camera raw files that can be used by a wide range of hardware and software vendors. DNG is an extension of the TIFF 6.0 format, and is compatible with the TIFF-EP standard. This initial version accompanied the launch of DNG and related products. It was a rare, possibly unique, example of a raw image format specification published by its owner. It was adequate for representing typical images, but it had a few errors and deficiencies (specifically the lack of support for "masked pixels" and an inadvertent deviation from the JPEG specification) that required it soon to be replaced by the next version.
- File extensions
-
dng - Source
- Adobe Systems Incorporated
Relationships
- Has priority over
- Is previous version of
- Is subtype of
Internal signatures
DNG 1.0 (little-endian, BOF)
- Note
- TIFF header plus DNGVersion tag near BOF
Byte sequences
- Min Frag Length
- Absolute from BOF
- Offset
- 0
- Max offset
- 0
- Byte Sequence
49492A00{0-4080}12C601000400000001000000- Endianness
- Little-endian
DNG 1.0 (little-endian, BOF+EOF)
- Note
- TIFF header plus DNGVersion tag near EOF
Byte sequences
- Min Frag Length
- Absolute from BOF
- Offset
- 0
- Max offset
- 0
- Byte Sequence
49492A00- Endianness
- Little-endian
- Min Frag Length
- Absolute from EOF
- Offset
- 0
- Max offset
- 128000
- Byte Sequence
12C601000400000001000000- Endianness
- Little-endian
DNG 1.0 (big-endian, BOF)
- Note
- TIFF header plus DNGVersion tag near BOF
Byte sequences
- Min Frag Length
- Absolute from BOF
- Offset
- 0
- Max offset
- 0
- Byte Sequence
4D4D002A{0-4080}C61200010000000401000000- Endianness
- Big-endian
DNG 1.0 (big-endian, BOF+EOF)
- Note
- TIFF header plus DNGVersion tag near EOF
Byte sequences
- Min Frag Length
- Absolute from BOF
- Offset
- 0
- Max offset
- 0
- Byte Sequence
4D4D002A- Endianness
- Big-endian
- Min Frag Length
- Absolute from EOF
- Offset
- 0
- Max offset
- 128000
- Byte Sequence
C61200010000000401000000- Endianness
- Big-endian
Changelog
-
Updated in V116
- Release date
- 23 November 2023
Digital Negative Format (DNG) 1.0: Max-offset increased to 128000 bytes for EOF signatures and MIME type of 'image/dng' added. Submitted by Brigham Young University.
-
Updated in V82
- Release date
- 27 March 2015
Digital Negative Format (DNG) 1.0: Set priority over Nikon Digital SLR Camera Raw Image File due to potential for clash.
-
Updated in V65
- Release date
- 25 October 2012
Digital Negative Format (DNG) 1.0: Gave explicit priority over fmt/353 Tagged Image File Format to remove multiple identification conflict identified through Ross Spencer's Skeleton Corpus.
-
Added in V60
- Release date
- 11 June 2012
DNG 1.0 (little-endian, BOF): Signature developed through PRONOM Research.
DNG 1.0 (little-endian, BOF+EOF): Signature developed through PRONOM Research.
DNG 1.0 (big-endian, BOF): Signature developed through PRONOM Research.
DNG 1.0 (big-endian, BOF+EOF): Signature developed through PRONOM Research.
Digital Negative Format (DNG) 1.0: Full entry added.