Apple Final Cut Pro 6 - Manual (Page 1388)

Chapter 27 Color Correction 603
III
Using Limit Effect Controls in the Color Corrector
and Color Corrector 3-Way Filters
The Limit Effect controls are a group of controls in the Color Corrector and Color
Corrector 3-way filters that let you key a specific color and apply color correction to
just the areas of the picture that you’ve keyed on.
For example, suppose you have a scene with people wearing different-colored shirts.
After the shoot, you decide you want to change the color of one of the actor’s shirts
that’s now yellow. Assuming there is nothing else in the picture with the same values
of yellow, you can use the Limit Effect controls to selectively make this change.
Limit Effect Controls
You can use the color value, saturation, and luma of your clip together or separately to
perform a key using the Limit Effect controls. For example, if you want to modify only
the bright areas of your picture, you can disable both color and saturation and then
perform only a luma key.
 Enable/Disable checkbox: Make sure there’s a checkmark in this checkbox for the
Limit Effect controls you want to use. This lets you add or remove color, saturation, or
luma from the criteria used to define a key.
 Reset button: Click to restore the Color Range, Saturation, and Luma controls to their
default values. Shift-click the button to reset all three controls at once.
 Color Range control: Allows you to fine-tune the range of color that you want to key on.
 Top handles: Let you select a larger or smaller range of colors that are keyed, based
on the original colors you selected with the Select Color eyedropper. These
handles correspond to the Chroma Width control in the numeric filter controls.
 Color gradient: Drag left or right within the color gradient to shift the overall hue
of the color range you’ve set with the top set of handles. This corresponds to the
Chroma Center control in the numeric filter controls.
 Bottom handles: Allow you to define the tolerance of your key. These handles
correspond to the Chroma Softness control in the numeric filter controls.
Top handle
Enable/Disable checkbox
Reset button
Saturation control
Luma control
Color Range control
Bottom handle