User Manual

Table Of Contents
Filter Node [Fltr]
The Filter node
Filter Node Introduction
The Filter node contains several standard convolution filters, easily selectable from a list. This
node enables a variety of effects, from radically changing the look of an image to adding subtle
randomly-generated film grain. The Sobel and Laplacian settings are often used for edge
detection.
Inputs
The Filter node includes two inputs: one for the main image and the other for an effect mask to
limit the area where the filter is applied.
Input: The orange input is used for the primary 2D image that gets the filter applied.
Effect Mask: The optional blue effect mask input accepts a mask shape created
by polylines, basic primitive shapes, paint strokes, or bitmaps from other tools.
Connecting a mask to this input limits the filter to only those pixels within the mask.
An effects mask is applied to the tool after the tool is processed.
Basic Node Setup
The Filter node can be inserted after an image, mask, or any node that needs a filter applied.
Below, it is used to create an edge matte, which is then used to mask the soft glow around the
keyed foreground.
A Filter node using the Sobel setting to extract an edge matte
Chapter – 91 Filter Nodes 2042