DNG image format support?

[dwebfan]

Seems like it is supported in file command already

$ file /tmp/sample1.dng
/tmp/sample1.dng: TIFF image data, little-endian, direntries=54, height=171, bps=662, compression=none, PhotometricIntepretation=RGB, manufacturer=Canon, model=Canon EOS 350D DIGITAL, orientation=upper-left, width=256

Sample file can be found at https://filesamples.com/formats/dng