LUT¶
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class
Draft.LUT¶ The Draft.LUT class contains Draft’s methods for working with Color Look-Up Tables (LUT). It contains two types of functions: Static functions, and Member functions. Static functions can be invoked without an instance (by calling Draft.LUT.<function name>), whereas Member functions must be invoked from an instance of a Draft.LUT object (by calling <someLUT>.<function name>).
The Static functions are used to create new instances of the Draft.LUT class, whereas the Member functions are used to work with existing instances of the Draft.LUT. The sample code snippets should clarify this distinction function in case you are unsure.
Raises an exception This class cannot be instantiated from Python
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Apply((LUT)arg1, (Image)image) → None :¶ Transform a
Draft.Image‘s color using this LUT.Arguments:
- image
- The image to transform. The image will be transformed in-place.
Usage:
image = Draft.Image.ReadFromFile( '//path/to/some/image/file.png' ) lut = Draft.LUT.CreateSRGB() lut.Apply( image )
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static
ClearOCIOCaches() → None :¶ Flush OCIO’s cached contents of LUTs on disk, intermediate results, etc.
New in version 1.2.
Arguments: (none)
Usage:
Draft.LUT.ClearOCIOCaches()
Note
Calling this is normally not necessary.
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static
CreateASCCDL((object)slope, (object)offset, (object)power[, (float)saturation=1]) → LUT :¶ Return a new linear-to-ASC-CDL LUT.
New in version 1.2.
Arguments:
- slope
- Three float values greater than or equal to 0 indicating the slope correction for the R, G, B channels. For example: [ 1.2, 0, 3.4 ].
- offset
- Three float values indicating the offset correction for the R, G, B channels. For example: [ -0.6, 0.2, 0 ].
- power
- Three float values strictly greater than 0 indicating the power correction for the R, G, B channels. For example: [ 1.1, 2, 3 ].
- saturation
- Optional. A float value greater than or equal to 0 indicating the saturation to apply. Defaults to 1.
Usage:
lut = Draft.LUT.CreateASCCDL( [1, 0, 3.4], [-0.6, 0.2, 0], [1.1, 2, 3], 1 )
Note
Draft does not compute the inverse of an ASC CDL LUT, and so calling Inverse() on one will throw a runtime error.
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static
CreateAlexaV3LogC() → LUT :¶ Return a new linear-to-ALEXA V3 Log C LUT.
Arguments: (none)
Usage:
alexaLut = Draft.LUT.CreateAlexaV3LogC()
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static
CreateCineon([(float)blackLevel=95[, (float)whiteLevel=685]]) → LUT :¶ Return a new linear-to-Cineon LUT.
Arguments:
- blackLevel
- Optional. An integer in the range [0..1023] indicating the black level. (Default is 95.)
- whiteLevel
- Optional. An integer in the range [0..1023] indicating the white level. (Default is 685.)
Usage:
cineonLut = Draft.LUT.CreateCineon()
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static
CreateGamma((float)gamma) → LUT :¶ Return a new linear-to-Gamma LUT.
Arguments:
- gamma
- A float value indicating the gamma to apply.
Usage:
gammaLut = Draft.LUT.CreateGamma( 2.2 )
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static
CreateOCIOProcessor((str)colorSpaceIn, (str)colorSpaceOut) → LUT :¶ Return a new OCIO LUT for converting images from colorSpaceIn to colorSpaceOut. (Note: Can also use role alias names from config.ocio.)
New in version 1.2.
Arguments:
- colorSpaceIn
- the colorspace the input images will be in.
- colorSpaceOut
- the desired colorspace for the processed images.
Usage:
ocioLUT = Draft.LUT.CreateOCIOProcessor( 'linear', 'Cineon' )
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static
CreateOCIOProcessorFromFile((str)filename) → LUT :¶ Return a new OCIO LUT based on the specified file.
New in version 1.2.
Arguments:
- filename
- name of the LUT file (including the path, either absolute, or relative to the search paths in config.ocio).
Usage:
lut = Draft.LUT.CreateOCIOProcessorFromFile( '//path/to/LUTfile.ext' )
Note
For a list of supported LUT file types, see: http://opencolorio.org/FAQ.html#what-lut-formats-are-supported.
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static
CreateRec709() → LUT :¶ Return a new linear-to-Rec. 709 LUT.
Arguments: (none)
Usage:
rec709Lut = Draft.LUT.CreateRec709()
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static
CreateSRGB() → LUT :¶ Return a new linear-to-sRGB LUT.
Arguments: (none)
Usage:
srgbLut = Draft.LUT.CreateSRGB()
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Inverse((LUT)arg1) → LUT :¶ Return a new LUT that performs the inverse operation of this LUT.
Arguments: (none)
Usage:
cineonLut = Draft.LUT.CreateCineon() inverseCineonLut = cineonLut.Inverse()
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static
SetOCIOConfig([(unicode)path='']) → None :¶ Initialize OCIO to use the config.ocio file specified by path. If no path is supplied, Draft checks the OCIO environment variable, then configurations distributed with Draft, and finally searches PATH for a directory containing a config.ocio file.
New in version 1.2.
Arguments:
- path
- path/to/config.ocio (optional)
Usage:
Draft.LUT.SetOCIOConfig( '//path/to/some/config.ocio' )
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