2017

Table Of Contents
Log
The Log operator applies a logarithmic or anti-logarithmic function to convert between linear and Cineon-style
encodings.
It is an Autodesk extension to the Academy/ASC XML color transform format.
Introduced
Version 1.3.
Contains
Description (page 1332). Optional, any number.
LogParams (page 1353). Required if the style attribute is "logToLin" or "linToLog". There should be one
occurence for values applied to all RGB channels, or three occurences for different values applied to R,
G, and B separately.
DynamicParameter (page 1362). Optional, no more than one. The param attribute must be set to
"DEFAULT_LOOK".
Contained By
ProcessList (page 1328)
Attributes
id, name, bypass, inBitDepth, outBitDepth See
Common Operator Attributes (page 1334).
style Specifies the formula to use for the conversion. 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 gamma, reference white, reference black, highlight, and
shadow values stored in the CTF file do not depend on the input and output bit depths.
In the following equations:
MeaningValue
"log10"
"log2"
1352 | Chapter 25 Colour Management