User Manual

Table Of Contents
Window Method: Some filters, such as Sinc and Bessel, require an infinite number of
pixels to calculate exactly. To speed up this operation, a windowing function is used
to approximate the filter and limit the number of pixels required. This control appears
when a filter that requires windowing is selected.
Hanning: This is a simple tapered window.
Hamming: Hamming is a slightly tweaked version of Hanning.
Blackman: A window with a more sharply tapered falloff.
Kaiser: A more complex window, with results between Hamming and Blackman.
Resize Filters from left to right: Nearest Neighbor, Box, Linear, Quadratic, Cubic, Catmull-Rom,
Gaussian, Mitchell, Lanczos, Sinc, and Bessel
Edges Buttons: Four buttons let you choose how to handle the space around images
that are smaller than the current DoD of the canvas as defined by the resolution of the
background image.
Canvas: The area outside the frame is set to the current color/opacity of the canvas.
If you want to change this value, you can attach a Set Canvas Color node between
the image connected to the foreground input and the foreground input itself, using
Set Canvas Color to choose a color and/or transparency setting with which to fill
the canvas.
Wrap: Creates a “video wall” effect by duplicating the foreground image as a grid.
Duplicate: Duplicates the outermost pixels along the edge of the foreground image,
duplicating them to stretch up, down, left, and right from each side to reach the end
of the DoD.
Mirror: Similar to duplicate, except every other iteration of the foreground image is
flipped and flopped to create a repeating pattern.
Invert Transform: Select the Invert Transform control to invert any position, rotation, or
scaling transformation. This option is useful when connecting the merge to the position
of a tracker for match moving.
Flatten Transform: The Flatten Transform option prevents this node from concatenating
its transformation with subsequent nodes. The node may still concatenate transforms
from its input, but it will not concatenate its transformation with the node at its output.
Reference Size: The controls under Reference Size do not directly affect the image.
Instead, they allow you to control how Fusion represents the position of the Merge
node’s center.
Normally, coordinates are represented as values between 0 and 1, where 1 is a distance
equal to the full width or height of the image. This allows resolution independence,
because the size of the image can be changed without having to change the value of
the center.
One disadvantage to this approach is that it complicates making pixel-accurate
adjustments to an image. To demonstrate, imagine an image that is 100 x 100 pixels in
size. To move the center of the foreground element to the right by 5 pixels, we would
change the X value of the merge center from 0.5, 0.5 to 0.55, 0.5. We know the change
must be 0.05 because 5/100 = 0.05.
Chapter – 86 Composite Nodes 1915