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Format

Digital Negative Format (DNG)

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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.
Release date
27 Sep 2004
File extensions
dng
Submitted by
Adobe Systems Incorporated

Relationships

Has priority over
Is previous version of
Is subtype of

Internal signatures

DNG 1.0 (little-endian, BOF)

Description
TIFF header plus DNGVersion tag near BOF
Provenance
Digital Negative (DNG) Specification Version 1.3.0.0 http://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/products/photoshop/pdfs/dng_spec.pdf

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)

Description
TIFF header plus DNGVersion tag near EOF
Provenance
Digital Negative (DNG) Specification Version 1.3.0.0 http://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/products/photoshop/pdfs/dng_spec.pdf; 11/2023 (v.116)- EOF max-offset increased to 128000. Submitted by Brigham Young University.

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)

Description
TIFF header plus DNGVersion tag near BOF
Provenance
Digital Negative (DNG) Specification Version 1.3.0.0 http://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/products/photoshop/pdfs/dng_spec.pdf

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)

Description
TIFF header plus DNGVersion tag near EOF
Provenance
Digital Negative (DNG) Specification Version 1.3.0.0 http://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/products/photoshop/pdfs/dng_spec.pdf; 11/2023 (v.116)- EOF max-offset increased to 128000. Submitted by Brigham Young University.

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

  • V116

    Release date
    23 November 2023

    • Updated

      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.

  • V82

    Release date
    27 March 2015

    • Updated

      Digital Negative Format (DNG) 1.0: Set priority over Nikon Digital SLR Camera Raw Image File due to potential for clash.

  • V65

    Release date
    25 October 2012

    • Updated

      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.

  • V60

    Release date
    11 June 2012

    • Added format

      Digital Negative Format (DNG) 1.0: Full entry added.

    • Added signature

      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.