cineSpace

[Michael Chenery]

Fortunately as cineSpace uses the CIE XYZ colour space as its internal working space, generating XYZ data for DCI deliverables is relatively simple.

There are two ways you can convert the graded RGB log data to DCI XYZ (gamma 2.6) ...

A) This method uses a generic p3-RGB to XYZ conversion LUT, but it is a two step process.

1) create a LUT in cineCubeVisual using the profiles ...
monitor profiler: p3.xml
target profile: fuji_target.xml (this should be the same target profile that was used to create the original film emulation LUT the RGB log material was graded through.

2) Burn this LUT into the material to create an RGB DCI version of the images.

3) create a LUT in cineCubeVisual using the profiles ...
monitor profiler: DCI_XYZ.xml (attached to this email)
target profile: p3.xml
This will create the generic DCI RGB-to-XYZ transform LUT.

4) Burn the generic DCI RGB-to-XYZ transform into the images to create the DCI XYZ material.

Any out of gamut colours (ones that will appear on film but not in DCI P3) will be clipped to the p3 gamut during the first conversion from film-log to p3 space.


B) This method is a single step and is what I would recommend.

1) create a LUT in cineCubeVisual using the profiles ...
monitor profiler: DCI_XYZ.xml (attached to this email)
target profile: fuji_target.xml (this should be the same target profile that was used to create the original film emulation LUT the RGB log material was graded through.
This creates a LUT that converts the graded log data to DCI XYZ data in one step.

2) Burn the created LUT into the material to create DCI XYZ (gamma 2.6) data that can be sent straight to the projector.

In this method any out of gamut data is not clipped until it reaches the Barco. This means that all of the original colour data from the film print is still contained in the DCI image data and so as DCI projectors improve in the future some one watching the same material on a new projector that has a gamut large enough to cover all of the gamut of film will be able to see the images exactly as the appeared on film.


Cheers,
Mike