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652 Chapter 23 Color Correction
Sample Lookup Tables
The following table lists the Lookup equivalents of other Shake color-correction nodes.
The following examples do custom lookups. The last two examples use Shake’s curve
formats, but use the Value mode (the V at the end of the curve name), and input x as
the value. All “keyframes” are between 0 and 1, and can take any value.
When using the interface, this is the default behavior—click the Load Curve button in
the Parameters tab to load the curve into the Curve Editor.
Function Brightness Invert
Math Expression f(x) = x * value f(x) = 1-x
Lookup Expression x*1.5 1-x
Graph
(white is result, gray is input)
Function Compress Do Nothing
Math Expression f(x) = x * (hi-lo) + lo f(x) = x
Lookup Expression “(x*.4)+0.3”
(if lo = 0.3 and hi =
0.7)
“x”
Graph
(white is result, gray is input)
Function Clipping Dampening
Lookup Expression x>.5?0:x x*x
Graph
(white is result, gray is input)