2017

Table Of Contents
<GammaParams channel="R" gamma="2.4" />
<GammaParams channel="G" gamma="2.35" />
<GammaParams channel="B" gamma="2.2" />
</Gamma>
</ProcessList>
ExposureContrast
The ExposureContrast element simulates adjusting the exposure of an image, and also modifies the contrast
between light and dark colors.
It is an Autodesk extension to the Academy/ASC XML color transform format.
If a color transform is used for display, then depending on the application users can still adjust the exposure
and contrast interactively as long as the CTF file contains at least one ExposureContrast element with
DynamicParameter sub-elements. In this case, the corresponding parameter values defined in the ECParams
sub-element are ignored for display only, and instead the values set in the application are applied at each
point in the transform chain that an ExposureContrast element with DynamicParameter sub-elements
occurs.
Introduced
Version 1.2.
Contains
Description (page 1332). Optional, any number.
ECParams (page 1351). Required, one only.
DynamicParameter (page 1362). Optional, up to 3. Each param attribute must be set to a different value.
Contained By
ProcessList (page 1328)
Attributes
id, name, bypass, inBitDepth, outBitDepth See
Common Operator Attributes (page 1334).
style Declares the input data type. Required.
NOTE The following equations assume that the input and output bit-depths are floating-point. For integers, the
values are normalized to [0.0, 1.0]. In other words, the exposure offset, contrast level, and pivot values stored in
the CTF file do not depend on the input and output bit depths.
MeaningValue
"linear"
"video"
1350 | Chapter 25 Colour Management