Anatomy of a CTF File

The transform format allows the author to define an arbitrary chain of color operators (also called processing nodes). The set of available operator types includes 1D LUTs, 3D LUTs, matrices, and others defined below. The format is written in XML and is therefore human readable.

Here is an example:

Copyright 2013 Autodesk, Inc. All rights reserved. 2013.3.pr27 ACES Reference Rendering Transform + HD video Output Device Transform aces_dev version 0.1.1 Academy Color Encoding Specification (ACES) HD (Rec 709) video 0 1 1

<!\-\- 65533 lines omitted -->

    </Array>
</LUT1D>
<Matrix inBitDepth="32f" outBitDepth="32f">
    <Array dim="3 3 3">

0.9259999990 0.0379999988 0.0359999985 0.1299999952 0.8000000119 0.0700000003 -0.0350000001 -0.0350000001 1.0700000525

0 0 0

<!\-\- 65533 lines omitted -->

   </Array>
</LUT1D>
<LUT3D inBitDepth="32f" interpolation="tetrahedral" outBitDepth="32f">
    <Array dim="48 48 48 3">

0.000669299 0.000704187 0.000766901 0.001848371 0.001297010 0.010368987 0.002599007 0.001144927 0.023227118

    </Array>
</LUT3D>
<Gamma inBitDepth="32f" outBitDepth="32f" style="moncurveFwd">
    <GammaParams gamma="2.600000000000000" offset="0.050000" />
</Gamma>
<Matrix inBitDepth="32f" outBitDepth="32f">
    <Array dim="3 3 3">

3.2409698963 -1.5373831987 -0.4986107647 -0.9692436457 1.8759675026 0.0415550582 0.0556300804 -0.2039769590 1.0569715500

0.0000 1.0000 0.0000 1.0000

Anatomy of a CTF File

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