Digital Negative - Technical Summary

Technical Summary

A DNG file always contains data for one main image, plus metadata, and optionally contains at least one JPEG preview. It normally has the extension "dng" or "DNG".

DNG conforms to TIFF/EP and is structured according to TIFF. DNG supports various formats of metadata, (including Exif metadata, XMP metadata, IPTC metadata), and specifies a set of mandated metadata.

DNG is both a raw image format and a format that supports "non-raw", or partly processed, images. The latter (non-raw) format is known as "Linear DNG". Linear DNG is still scene-referred and can still benefit from many of the operations typically performed by a raw converter, such as white balance, the application of a camera color profile, HDR compositing, etc. All images that can be supported as raw images can also be supported as Linear DNG. Images from the Foveon X3 sensor or similar, hence especially Sigma cameras, can only be supported as Linear DNG.

DNG can contain raw image data from sensors with various configurations of color filter array (CFA). These include: conventional Bayer filters, using 3 colors and rectangular pixels; 4 color CFAs, for example the RGBE filter used in the Sony DSC-F828; rectangular (non-square) pixels, for example as used in the Nikon D1X; and offset sensors (for example with octagonal pixels) such as Super CCD sensors of various types, as used in various Fujifilm cameras. (Or combinations of these if necessary). DNG specifies metadata describing these individual parameters; this is one significant extension to TIFF/EP.

When used in a CinemaDNG movie clip, each frame is encoded using the above DNG image format. The clip's image stream can then be stored in one of two formats: either as video essence using frame-based wrapping in an MXF file, or as a sequence of DNG files in a specified file directory.

Read more about this topic:  Digital Negative

Other articles related to "technical summary":

Currency Of Spanish America - Technical Summary
... Although Mexico and Peru were the chief source of the world's silver, after 1620 silver was always at a premium in Spain and vellón constituted the accounting unit and the chief medium of exchange (the cuarto also became a common accounting unit) ... The silver flowed through Spain in a steady stream to pay for imports, wars, and imperial expansion ...

Famous quotes containing the words summary and/or technical:

    I have simplified my politics into an utter detestation of all existing governments; and, as it is the shortest and most agreeable and summary feeling imaginable, the first moment of an universal republic would convert me into an advocate for single and uncontradicted despotism. The fact is, riches are power, and poverty is slavery all over the earth, and one sort of establishment is no better, nor worse, for a people than another.
    George Gordon Noel Byron (1788–1824)

    Where there is the necessary technical skill to move mountains, there is no need for the faith that moves mountains.
    Eric Hoffer (1902–1983)