User Manual

Blue channels out of each node connected to its three inputs, and reassembles them into a
single RGB image again. Of course, what happens in between the Splitter and Combiner is
entirely up to you.
One of the simplest ways of showing the possibilities of this node structure is to combine it with
Node Sizing in the Sizing palette. Using Node Sizing, you can correct for misaligned channels in
older archived video, or create channel misalignments for creative looks. In the following
example, a simple Node Sizing adjustment to a split Blue channel will create an interesting
“prism vignette” effect.
To use Node Sizing on individually split channels:
1 Choose Nodes > Add Splitter/Combiner Node (or press Option-Y) to add a premade
Splitter/Combiner node structure to the Node Editor.
2 Select the middle of the three Corrector nodes appearing in between the Splitter and
Combiner nodes (Node 5 in the following screenshot).
3 Open the Sizing palette, choose Node Sizing from the Mode drop-down, and then raise
the zoom parameter by a small amount; this example uses 1.014.
Zooming just one color channel
using the Splitter/Combiner nodes
As you can see in the screenshot, just the Green channel has been zoomed in on
across the entire image. This is only possible using Node Sizing. This is cool, but not
quite what you need.
4 Open the Window palette, add a Circular window, turn on its Invert control, and
transform it to be a very soft, horizontally aligned vignette. This limits the individual
scaling done to the Green channel to just the outer edge of the image, similar to a lens
with excessive chromatic aberration.
The resulting channel split effect
You could easily keep going, applying varying amounts of zoom with different window shapes
to each of the other color channels, and perhaps adding some blur to enhance the effect, but
this example should show the creative potential available when using this technique.
Chapter – 127 Channel Splitting and Image Compositing 2882