Perimeter – Advanced Edge Matte Tool For Nuke

The EdgeDetect node in Nuke is good, but limited. Perimeter is a more advanced option for making custom edge mattes.

Features

➔ Fast. Perimeter has been streamlined to be efficient and lightweight.

➔ Powerful. Customise and fine tune your edge matte to get it exactly right.

➔ Accurate. Under the hood, Perimeter is using Erode_Fine by SpinVFX for sub-pixel accuracy.

Interface

➔ Global controls for quickly setting up the edge matte:

• Select the Source channel to use for creating the edge matte. By default, it is the alpha channel of the Source input.

• (Optional) Select the Mask channel to use for the mask. By default, it is the alpha channel of the Mask input, if connected.

• Expand the edge matte both inward and outward at the same time.

• Apply a Round filter to round out the edges of the matte.

• Soften the edge matte both inward and outward.

• Offset the edge matte inward or outward. (💡 Works as intended when both the Enable Inner and Enable Outer checkboxes are ticked).

• Control the output bounding box. A side will output the edge matte’s bounding box. B side will output the Source input’s bounding box. Union will output the union of A and B. Or, Crop the bounding box to the Source input's format (i.e. not its bounding box).

• Add Source interaction. Mask or stencil the edge matte by the Source.

➔ Individual controls for fine tuning the inner and outer edges:

• Expand the edge matte inward or outward individually.

• Enable/disable the inner or outer edge individually.

• Soften the inner or outer edge individually.

• Limit the softening to the inside or outside individually, or let it spill over from one to the other.

• Mix back the opacity of the inner or outer edge individually.

Example: Using Perimeter to make a custom edge matte with a softer inside than outside edge.

I hope you find Perimeter useful. For more Nuke tools, see Nuke.