2017

■ The gamma of the conversion curve
■ The gamma of the incoming film negative
■ The degree to which the shoulder at the upper end of the conversion curve is softened
When you modify these values, the basic LUT curves are updated to reflect the changes. For all procedures,
you can monitor the R, G, and B channels independently while modifying the LUT.
To monitor the R, G, and B channels independently:
1 From the Edit Curve box, select Red, Green, or Blue to monitor the red, green, or blue channels
independently.
Modifying Reference White and Reference Black Values
The reference white and reference black values define the intensity levels at which incoming pixels are
considered white or black respectively. For example, selecting a logarithmic-to-linear basic conversion LUT
curve sets the reference white to 685 and the reference black to 95. (These have been shown to be good
values for Kodak
™
film stock.) As a result, source pixels with values from 685 and 1023 will produce white
pixels, while those from 0 and 95 will be set to black.
Reference white and black are affected by the values assigned to highlights and shadows. White pixels are
mapped to the value set for highlights, while black pixels are mapped to the value set for shadows. See
Modifying Highlights and Shadows (page 1284).
To modify reference white or black values using the Ref White and Ref Black fields:
1 Do one of the following:
■ To set proportional R, G, and B values, enable Prop and then enter the value in one of the
(left-to-right) R, G, and B Ref White and Ref Black fields.
■ To set independent R, G, or B values, disable Prop and then enter the value in the corresponding
(left-to-right) R, G, or B Ref White and Ref Black fields.
Applying Colour Management to Clips | 1283