Apple Color 1.0 - Manual (Page 251)

Chapter 11 Color FX 251
When multiplying two images, the darkest parts of the images remain unaffected,
while the lightest parts of the image are the most affected. This is useful for tinting
operations, as seen previously, as well as for operations where you want to combine
the darkest portions of two images.
RGB Merge
The three inputs are used to insert individual channels into the red, green, and blue
color channels. You can split the three color channels apart using the RGB Split node,
process each grayscale channel individually, and then reassemble them into a color
image again with this node.
Effects Nodes
The following nodes have a single input, and are used to apply a single correction or
effect to the image.
B&W
Desaturates the image to produce a grayscale, monochrome image consisting of only
the Luma component.
Bleach Bypass
Raises the contrast and desaturates the image. Simulates laboratory silver-retention
processes used to raise image contrast in film by skipping the bleaching stage of film
development, leaving exposed silver grains on the negative which boost contrast,
increase grain, and reduce saturation.
Blur
Blurs the image. Blur has one parameter:
 Spread: The amount of blur. Can be set to a value from 0 (no blur) to 40 (maximum
blur).
Clamp
Two parameters clip the minimum and maximum values in the image. Clamp has two
parameters:
 Min: The minimum level in the image. Any levels below this value are set to this
value.
 Max: The maximum level in the image. Any levels above this value are set to this
value.
Curve
A curve that affects image contrast, similar to the Luma curve in the Primary In room.
Selecting this node reveals a curve control in the Parameters tab that works identically
to those found in the Primary In room.