Apple Final Cut Pro 7 - Manual (Page 1364)

Note: With a match color selected, the functionality of the Whites, Blacks, and Mids
controls is unaffected. Only the functionality of the Auto-Balance eyedroppers is affected
by the Match Hue controls.
Limit Effect Controls in the Color Corrector Filter
The Limit Effect controls are a group of controls in the Color Corrector filter 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.
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 turn off both color and saturation and then perform
only a luma key.
Top handle
Enable/Disable checkbox
Reset button
Saturation control
Luma control
Color Range control
Bottom handle
• 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.
1364 Chapter 81 Color Correction Filters