Digital Picture Exchange
Digital Picture Exchange (DPX) is a common file format for digital intermediate and visual effects work and is a SMPTE standard (ST 268-1:2014). The file format is most commonly used to represent the density of each colour channel of a scanned negative film in an uncompressed "logarithmic" image where the gamma of the original camera negative is preserved as taken by a film scanner. For this reason, DPX is the worldwide-chosen format for still frames storage in most digital intermediate post-production facilities and film labs. Other common video formats are supported as well (see below), from video to purely digital ones, making DPX a file format suitable for almost any raster digital imaging applications. DPX provides, in fact, a great deal of flexibility in storing colour information, colour spaces and colour planes for exchange between production facilities. Multiple forms of packing and alignment are possible. The DPX specification allows for a wide variety of metadata to further clarify information stored (and storable) within each file.

The DPX file format was originally derived from the Kodak Cineon open file format (codice_1 file extension) used for digital images generated by Kodak's original film scanner. The original DPX (version 1.0) specifications are part of SMPTE 268M-1994. The specification was later improved and published by SMPTE as ANSI/SMPTE 268M-2003. Academy Density Exchange (ADX) support for the Academy Color Encoding System are added in the current version of the standard SMPTE ST 268-1:2014. Extensions for high-dynamic-range video and wide color gamut are standardized in SMPTE ST 268-2:2018.
Q235557
file format
Concept
Q61695203
digital intermediate
ORG
Q8317
visual effects
Concept
Q1779011
SMPTE
ORG
Q907315
density
Concept
Q937378
logarithmic
Concept
Q1144257
gamma
UNK
Q4220904
original camera negative
Concept
Q210640
film scanner
Concept
Q486269
Kodak
ORG
Q2972802
Cineon
MISC
Q210640
film scanner
Concept
Q1779011
SMPTE
ORG
Q180003
ANSI
ORG
Q16974156
Academy Color Encoding System
MEDIA
Q28060362
high-dynamic-range video
Concept
Q375857
wide color gamut
UNK
Q527723
Digital Picture Exchange
MISC
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subclass of
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