Supported

The file format libopenraw supports even partially:

• Adobe DNG
• Canon
  • CRW
  • CR2
  • CR3
• Epson ERF
• Fuji RAF
• Minolta MRW
• Nikon NEF and NRW
• Olympus ORF
• Panasonic RAW and RW2
• Pentax PEF
• Sony ARW and SRF

Compression

Known compression schemes used.

• Lossless JPEG

Not Supported

The file format that are not supported due to lack of documentation, sample or resources. There is a plan to support them in the long term. Any help is welcome.

• Foveon X3F
• Kodak
  • DCR
  • KDC
• Mamiya MEF
• Sony
  • SR2

Metadata

Lens Types

MakerNotes usually store the lens type in some way. Sometime as a string, sometime as an numerical ID, or something else. There is no standard and it is mostly per vendor.

Nikon

See NEF documentation

Pentax

See PEF documentation

Canon

See CR2 documentation

Other references

• http://crousseau.free.fr/imgfmt_raw.htm (via the Internet Archive) (in French, by one of the developers of DxO)
• The excellent File Format section from the archive team wiki

Sample Files

The internet is somewhat rich in sample files. The manufacturers however don’t provide any. Some sources:

• https://raw.pixls.us/ the most comprehensive repository for CC-0 RAW files..
• http://raw.fotosite.pl/ (via the Internet Archive) has a public repository of RAW files from various camera.
• http://digikam3rdparty.free.fr/TEST_IMAGES/RAW/ from the Digikam team.
• Imaging Resource has a lot of sample files attached to their reviews.
• DPReview also has RAW files for comparison
• Photographyblog has RAW sample in ther reviews.