The ASC_CDL operator represents a color transform in the American Society of Cinematographers' Color Decision List format (*.ccc or *.cdl).
An ASC CDL transform consists of a slope-offset-power (SOP) function applied individually to each of the RGB channels, followed by a saturation function applied equally to all channels.
It is an Autodesk extension to the Academy/ASC XML color transform format.
Introduced
Version 1.3.
Contains
- Description. Optional, any number.
- SOPNode. Optional, no more than one. If absent, no slope-offset-power function is applied.
- SatNode. Optional, no more than one. If absent, no saturation function is applied.
- DynamicParameter. Optional, no more than one. The param attribute must be set to "DEFAULT_LOOK".
Contained By
Attributes
- id, name, bypass, inBitDepth, outBitDepth
- See Common Operator Attributes.
- style
- Determines the formula applied by the operator. Note: The 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 slope, offset, power, and saturation values stored in the CTF file do not depend on the input and output bit depths.Note: The luma weights assume that the image uses the primaries specified by Rec. 709 (for example, HD and sRGB).
Value Meaning "v1.2_Fwd" 
"v1.2_Rev" The inverse of "v1.2_Fwd". "noClampFwd" The same as "v1.2_Fwd", but without the two clamp functions. If 
then no power function is applied.
"noClampRev" The inverse of "noClampFwd".
Example
<ProcessList version="1.3" id="7b42c76a-8c7a-4142-8b6e-1c467084075a">
<ASC_CDL id="cc01234" inBitDepth="16f" outBitDepth="16f" style="v1.2_Fwd">
<Description>scene 1 exterior look</Description>
<SOPNode>
<Slope>1.000000 1.000000 0.900000</Slope>
<Offset>-0.030000 -0.020000 0.000000</Offset>
<Power>1.2500000 1.000000 1.000000</Power>
</SOPNode>
<SatNode>
<Saturation>1.700000</Saturation>
</SatNode>
</ASC_CDL>
</ProcessList>