User Manual

Table Of Contents
Basic Node Setup
The Unsharp Mask node receives a 2D image like the MediaIn1 shown below. The output
continues the node tree by connecting to another 2D image-processing node or a Merge node.
An Unsharp mask node applied to a MediaIn1 node
Inspector
Controls Tab
The Controls tab contains all the primary controls necessary for customizing the Unsharp Mask
operation.
Color Channels (RGBA)
The filter defaults to operating on R, G, B, and A channels. Selective channel filtering is possible
by clicking the channel buttons to make them active or inactive.
NOTE: This is not the same as the RGBA checkboxes found under the common
controls. The node takes these selections into account before it processes the image,
so deselecting a channel causes the node to skip that channel when processing,
speeding up the rendering of the effect. In contrast, the channel controls under the
Common Controls tab are applied after the node has processed.
Lock X/Y
When Lock X/Y is checked, both the horizontal and vertical sharpen amounts are locked.
Otherwise, separate amounts of glow may be applied to each axis of the image.
Size
This control adjusts the size of blur filter applied to the extracted image. The higher this value,
the more likely it is that pixels are identified as detail.
Gain
The Gain control adjusts how much gain is applied to pixels identified as detail by the mask.
Higher values create a sharper image.
Threshold
This control determines the frequencies from the source image to be extracted. Raising the
value eliminates lower-contrast areas from having the effect applied.
Chapter – 84 Blur Nodes 1838