Apple Color 1.5 - Manual (Page 303)

Blend
This node mixes two inputs together based on the Blend parameter. The order in which
the inputs are connected does not matter. Blend has one parameter:
• Blend: When set to 0, only Input 1 is output. When set to .5, Input 1 and Input 2 are
blended together equally and output. When set to 1, only Input 2 is output.
Darken
Emphasizes the darkest parts of each input. Overlapping pixels from each image are
compared, and the darkest pixel is preserved. Areas of white from either input image
have no effect on the result. The order in which the inputs are connected does not matter.
Difference
The pixels from the image that’s connected to Source 1 are subtracted from the pixels
from the image that’s connected to Source 2. Black pixels have a value of 0, so any color
minus black results in no change to the image from Source 1. Since this is subtraction,
the order in which the inputs are connected matters.
Interlace
The images connected to each input are interlaced. The Left input is for the Even field,
and the Right input is for the Odd field. This node is used at the end of node trees that
begin with Deinterlace nodes to process effects for projects using interlaced media.
Lighten
Lighten emphasizes the lightest parts of each input. Overlapping pixels from each image
are compared, and the lightest pixel is preserved. The order in which the inputs are
connected does not matter.
Multiply
The pixels from each input image are multiplied together. White pixels have a value of
1, so white multiplied with any other color results in no change to the other image.
However, when black (0) is multiplied with any other color, the result is black.
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 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 an image.
303 Chapter 11 The Color FX Room