Logarithmic data is automatically converted to linear data on import by applying a 1D LUT to the imported image. However, if you need to work in log space, you can modify both the display and image data by using the Log and Delog tools.
The Log and Delog tools let you transform between linear and log color space. The Log tool transforms from linear to log space and the Delog tool transforms from log to linear space.
The log space in Composite is very similar to that used by Cineon encoding, but it does not clamp high dynamic range values, and it is scaled with respect to the Cineon codes. That is, a Cineon code of 1023 corresponds to a value of 1.0.
The transformations can be controlled with the negative film gamma, the Cineon reference, and the linear reference. These reference points are expressed in units of the log space described above. You can display their value either as raw or as Cineon codes.
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