OCIOCDLTransform node

This documentation is for version 1.0 of OCIOCDLTransform (fr.inria.openfx.OCIOCDLTransform).

Description

Use OpenColorIO to apply an ASC Color Decision List (CDL) grade.

The formula applied for each channel is:

out = (in * slope + offset)^power.

The saturation is then applied to all channel using the standard rec709 saturation coefficients:

luma = 0.2126 * inR + 0.7152 * inG + 0.0722 * inB

outR = Clamp( luma + sat * (inR - luma) )

outG = Clamp( luma + sat * (inG - luma) )

outB = Clamp( luma + sat * (inB - luma) ).

The grade can be loaded from an ASC .ccc (Color Correction Collection) or .cc (Color Correction) file.

Inputs

Input	Description	Optional
Source		No
Mask		Yes

Controls

Parameter / script name	Type	Default	Function
Slope / slope	Color	r: 1 g: 1 b: 1	ASC CDL slope
Offset / offset	Color	r: 0 g: 0 b: 0	ASC CDL offset
Power / power	Color	r: 1 g: 1 b: 1	ASC CDL power
Saturation / saturation	Double	1	ASC CDL saturation
Direction / direction	Choice	Forward	Transform direction. Forward (forward) Inverse (inverse)
Read from file / readFromFile	Boolean	Off	Load color correction information from the .cc or .ccc file.
File / file	N/A		Specify the src ASC CDL file, on disk, to use for this transform. This can be either a .cc or .ccc file. If .ccc is specified, the cccid is required.
Reload / reload	Button		Reloads specified files
CCC Id / cccId	String		If the source file is an ASC CDL CCC (color correction collection), this specifies the id to lookup. OpenColorIO::Contexts (envvars) are obeyed.
Export / export	N/A		Export this grade as a ColorCorrection XML file (.cc), which can be loaded with the OCIOFileTransform, or using a FileTransform in an OCIO config. The file must not already exist.
Enable GPU Render / enableGPU	Boolean	Off	Enable GPU-based OpenGL render (only available when “(Un)premult” is not checked). If the checkbox is checked but is not enabled (i.e. it cannot be unchecked), GPU render can not be enabled or disabled from the plugin and is probably part of the host options. If the checkbox is not checked and is not enabled (i.e. it cannot be checked), GPU render is not available on this host.
(Un)premult / premult	Boolean	Off	Divide the image by the alpha channel before processing, and re-multiply it afterwards. Use if the input images are premultiplied.
Invert Mask / maskInvert	Boolean	Off	When checked, the effect is fully applied where the mask is 0.
Mix / mix	Double	1	Mix factor between the original and the transformed image.