Apple Color 1.0 - Manual (Page 252)

252 Chapter 11 Color FX
Duotone
Desaturates the image, mapping the black and white points of the image to two user
customizable colors to create tinted images with dual tints from white to black.
Duotone has two parameters:
 Light Color: The color that the white point is mapped to.
 Dark Color: The color that the black point is mapped to.
Edge Detector
A convolution filter that boosts image contrast in such a way as to reduce the image to
the darkest outlines that appear throughout. Edge Detector has two parameters:
 B&W: Desaturates the resulting image. Useful when using this node to generate
mattes.
 Scale: Adjusts the white point. Lowering scale helps increase contrast and crush
midtone values to emphasize the outlines.
 Bias: Adjusts overall contrast. Lowering Bias increases contrast, while raising it lowers
contrast.
Exposure
Raises the highlights or crushes the shadows, depending on whether you raise or lower
the Exposure parameter. This node has one parameter:
 Exposure: Raising this parameter raises the highlights while keeping the black point
pinned. Setting this parameter to 0 results in no change. Lowering this parameter
scales the image levels down, crushing the shadows while lowering the highlights by
a less severe amount.
Film Grain
Adds noise to the darker portions of an image to simulate film grain or video noise due
to underexposure. Highlights in the image are unaffected. This node is useful if you
have to match a clean, well-exposed insert shot into a scene that’s noisy due to
underexposure. Also useful for creating a distressed film look. This node has three
parameters:
 Grain Intensity: Makes the noise more visible by raising its contrast ratio (inserting
both light and dark pixels of noise) as well as the saturation of the noise.
 Grain Size: Increases the size of each “grain” of noise that’s added. Bear in mind that
the size of the film grain is relative to the resolution of your project. Film grain of a
particular size applied to a standard definition shot will appear “grainier” than the
same-sized grain applied to a high definition shot.
 Monochrome: Turning this button on results in the creation of monochrome, or
grayscale, noise, with no color.