User Manual

Table Of Contents
Inspector
Controls Tab
The Controls tab is used to set the filter size and then use the filter matrix to enter convolution
filter values.
Color Channels (RGBA)
The custom filter defaults to operating on R, G, B, and A channels. Selective channel editing is
possible by enabling or disabling the checkboxes beside each channel.
This is not the same as the RGBA checkboxes found under the Common Controls. The node
takes these controls into account before it processes. Deselecting a channel causes the node
to skip that channel when processing, speeding up the rendering of the effect. In contrast,
these controls under the Common Controls tab are applied after the node has processed.
Matrix Size
This menu is used to set the size of the filter at 3 x 3 pixels, 5 x 5 pixels, or 7 x 7 pixels, thus
setting the radius of the pixels sampled. The larger the size, the more time it takes to render.
Update Lock
When this control is selected, Fusion does not render the filter. This is useful for setting up each
value of the filter, and then turning off Update Lock and rendering the filter.
Filter Matrix
The Filter Matrix control is a 7 x 7 grid of text boxes where a number is entered to represent
how much influence each pixel has on the overall convolution filter. The text box in the center
represents the pixel that is processed by the filter. The text box to the left of the center
represents the pixel to the immediate left, and so forth.
The default Matrix size is 3 x 3. Only the pixels immediately adjacent to the current pixel are
analyzed. If a larger Matrix size is set, more of the text boxes in the grid are enabled for input.
Normalize
This controls the amount of filter normalization that is applied to the result. Zero gives a
normalized image. Positive values brighten or raise the level of the filter result. Negative values
darken or lower the level.
Chapter – 91 Filter Nodes 2037