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UNDERSTANDING RAW & REDCODE RAW FILES
The latest generation of HD cameras
(e.g. the Red One made by
Red Digital Cinema)
record images differently than traditional video cameras. Specifically,
they use a variation of the format known as RAW,
which has traditionally been used in still photography.
RAW
Files
Adobe Systems was the first
software company to use RAW for image storage. Photoshop, their flagship product, uses the
PSD format, essentially a RAW codec.
RAW files are so named because they
are not processed. In other words, everything the camera "sees" is
recorded. Consequently, the highly detailed RAW files are considered the
equivalent of film negative.
RAW files are too large for anything
but storage. For practical use, such as in documents, they must be compressed into smaller formats like JPEG or GIFF.

Benefits
The main benefit of using RAW is that such
files can contain large amounts of information. This makes it possible
to record extremely high resolution images. In fact, the amount of recorded
information is so great that all image adjustments can be saved for postproduction, including
color, gain, and sharpening (diffusion).
Does this mean you don't have to
white balance? Yes. You can white balance to give the RAW images a
uniform look, but it is not necessary. Cinematographers are fond of
diffusion filters to soften the image. Again, this can be applied in
postproduction (although any cinematographer worth his salt will be
reluctant to surrender such creative control).
Amazingly, correct exposure is the only adjustment that
has to be made
to the camera, and even this can be estimated. An unusual approach to
camera setup, to say the least!
Enter REDCODE RAW
RAW files are proprietary and differ
from from one manufacturer to another. Red Digital Cinema's version of RAW
is called REDCODE RAW.
REDCODE RAW enables the huge 4K video
images to be compressed into
manageable file sizes, and then uncompressed with virtually no loss of
image quality. Because they are RAW files, the compression is
minimal--just enough for practical storage.
As of this writing, REDCODE RAW
offers two levels of compression, REDCODE 28 and REDCODE 36. The
latter provides less compression and is appropriate for highly detailed
scenes such as, for example, wide shots.
As other manufacturers venture into
the realm of ultra HD, they will invariably develop their own version
of RAW.
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