Apple Shake 4 - Manual (Page 635)

Chapter 23 Color Correction 635
areaMinimum
The minimum value found within the analysis area over the span of the analysisRange.
areaMaximum
The maximum value found within the analysis area over the span of the analysisRange.
areaWindowParamameters subtree
The areaWindowParameters subtree contains parameters that define the size and
location of the region that encompasses each analysis area, including the following:
• areaX, Y: The center of the analysis area. These coordinates define the location of the
analysis area, and are the parameters to animate if you want to move the analysis
area.
• areaWidth, areaHeight: The width and height of the analysis area.
• areaVisible: A slider toggle that makes the analysis area boundary box visible. This
parameter is updated when one of the Analyze controls is clicked. This parameter
corresponds to the Visibility button found next to the area name parameter.
Add, Delete, Save
These three buttons let you add, delete, and save new analysis areas.
Color-Correction Nodes
In general, Shake has three classes of color-correction nodes, which are located in the
Color Tool tab.
Atomic-Level Correctors
Each atomic-level corrector node (Add, Brightness, Clamp, Lookup, and so on) applies a
single basic mathematical function to your color, such as add, multiply, gamma, and
basic lookup curve functions. These functions usually concatenate for speed and
accuracy, and are fast ways to manipulate your data for a wide variety of purposes. In
the Color Tool tab, each node’s icon consists of a graph that represents its function. In
the following illustration, notice the difference in the graph curves for the Clamp,
Compress, and Expand nodes.
Utility Correctors
The utility correctors are nodes that prepare an image for other types of operations.
Typically, these include ColorSpace, ColorX, Lookup, MDiv, MMult, Reorder, Set, SetAlpha,
SetBGColor, and VideoSafe. For more sophisticated functionality, there is a certain
degree of programmability in the ColorX and the Lookup nodes, which allow you to
create expressions that affect the image.