Apple Color 1.5 - Manual (Page 305)

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 three 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. Keep 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.
Film Look
An “all-in-one” film look node. Combines the Film Grain operation described above with
an “s-curve” exposure adjustment that slightly crushes the shadows and boosts the
highlights. Contrast in the midtones is stretched, but the distribution of the midtones
remains centered, so there’s no overall lightening or darkening. 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.
305 Chapter 11 The Color FX Room