Houdini 21.0 Nodes Copernicus nodes

Sharpen Copernicus node

Sharpens an input layer to increase the definition of its edges.

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This node sharpens a layer by applying an unsharp mask to its pixels. The node creates an unsharp (blurred) negative mask of the source layer, and then combines this mask with the original source layer. The Amplitude determines the strength of this combination. The size of the unsharp mask determines the size of the sharpen effect.

Note

The Blur COP in the Sharpen node’s subnetwork adds blurring and hazing to make the unsharp mask. Use the Units, Size, and Scale Size parameters in the Sharpen node to control this blur radius.

Use this node when you want to make an image less blurry and harden its edges.

Tip

Use a Maximum node to remove black edges from your sharpened layer. Wire the original layer into the Maximum’s bg input and the Sharpen’s filter output into the Maximum’s fg input.

Parameters

Signature

The layer type that the source accepts.

See Signatures for more information.

Mask

The amount of the new value to mix in with the original value. Higher values mix in more of the new value. Lower values mix in less of the new value.

The default value is 1, which means this node uses only the new value. See Mask for more information.

Units

The unit of measurement that the Blur COP in the node’s subnetwork uses to determine the size of the sharpen effect’s radius.

Image

Use image space to configure the size of the sharpen effect’s radius.

Pixels

Use pixels to configure the size of the sharpen effect’s radius.

Size

The size of the sharpen effect’s radius in image space or pixels, which the Units parameter determines. Higher values expand the circumference of the radius to enhance the crispness of the sharpen effect. Lower values contract the circumference of the radius to add softness and remove the sharpen effect.

Scale Size

The amount to scale the sharpen effect’s radius.

Amplitude

The amount by which to multiply the original layer’s pixels by the unsharp mask. Higher values increase the sharpen effect, while lower values remove the sharpen effect.

Gain

The amount by which to multiply the brightness of the original layer’s pixels. Set this parameter to 0 and Amplitude to a positive value to generate a high-pass filter.

Threshold

The difference in pixel value between the original layer and its unsharp mask that’s required for the node to sharpen the layer. Higher values help remove high frequency noise that you might not want to sharpen.

Inputs

source

The input layer or VDB to sharpen.

size

An optional per-pixel size amount that’s scaled by the Size parameter.

mask

An optional per-pixel mask amount that’s scaled by the Mask parameter.

Outputs

filter

The sharpened layer or VDB.

See also

Copernicus nodes