Denoise AI Copernicus node

Denoises an input layer.

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Parameters
Inputs
Outputs

This node runs a denoiser on the original layer. It currently supports Intel Open Image Denoise (included with Houdini) and the NVIDIA OptiX Denoiser (must be installed separately). You must be on a supported platform and have the chosen denoising library installed for this to work.

The NVIDIA OptiX Denoiser only works with NVIDIA cards. It is now included with the NVIDIA driver (version 435 or later).

Parameters ¶

Denoiser

The library to use to denoise the image.

Intel Denoiser

Use the Intel Open Image Denoise library. This library ships with Houdini so it should always be available.

Optix Denoiser

Use the NVIDIA OptiX library. This option is only available if you have an NVIDIA graphics card with the approriate driver.

Auxiliary Planes Are Clean

Sets the cleanAux filter parameter for further improving quality when the auxilary feature (albedo, normal) planes are noise-free, as described in the OIDN documentation.

Prefilter Auxiliary Planes

Whether to prefilter the albedo and normal auxiliary planes before denoising the image planes. For the best possible quality, it is recommended to prefilter the auxiliary planes if they are noisy and turn on Auxiliary Planes Are Clean. While prefiltering generates better results and should be used for final frames, it will hurt performance and thus should be turned off when doing previews or interactive rendering.

Inputs ¶

source

Input image to denoise.

normal

If you connect to this input, this is the normal AOV for the original layer. Some denoising libraries can use normals and/or albedo to get a better sense of the image, guiding how and where it reduces noise.

albedo

If you connect to this input, this is the albedo AOV for the original layer. Some denoising libraries can use normals and/or albedo to get a better sense of the image, guiding how and where it reduces noise.

motionvec

If you connect to this input, this is the motion vectors AOV for the original layer. OptiX requires this layer to eliminate temporal noise.

prevframe

If you connect to this input, this is the previous denoised frame. In the first frame of a sequence, it could be set to the noisy beauty image of the first frame instead of the denoised version and all flow vectors set to zero. OptiX requires this layer to eliminate temporal noise.

Outputs ¶

denoise

The denoised original layer.

Copernicus nodes

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Block End

End of a block, declaring its outputs.
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Bokeh

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Bright

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Camera Import

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Camera Properties

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Channel Extract

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Channel Join

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Channel Split

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Channel Swap

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Chroma Key

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Chromatic Aberration

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Clamp

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Compare

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Constant

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Contact Sheet

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Convert Normal

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Crop

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Cross Product

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Cryptomatte

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Cryptomatte Decode

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Cryptomatte Encode

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Denoise AI

Denoises an input layer.
Denoise TVD

Removes white noise from an image.
Derivative

Computes the derivative of the source layer along the x- and y-axis.
Dilate Erode

Dilates or erodes a layer.
Distort

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Dot Product

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Edge Detect

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Edge Detect by Contour

Detects varying-width silhouette lines.
Edge Detect by Depth

Detects varying-width self-occluding silhouettes.
Edge Detect by Normal

Detects varying-width crease-lines.
Eikonal

Computes distances by solving the Eikonal equation.
Equalize

Equalizes colors by stretching or shifting their range.
Error

Generates a message, warning, or error.
Extrapolate Boundaries

Fills empty areas of an image using colors at the edges of non-empty areas.
Feather

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Loads an image or video from disk.
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Flip

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Fractal Noise

Generates fractal noise.
Fractal Noise 3D

Generates fractal noise from 3D locations.
Function

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Applies gamma correction to a layer.
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Converts a 2D volume into a layer.
Glow

Adds glow to an image based on its luminance.
HSV Adjust

Converts between RGB and HSV color spaces, or modifies HSV.
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Height to Normal

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Hex Tile

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Histogram

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Creates a mask from an ID layer based on filtering parameters.
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ID to RGB

Converts an ID layer into an RGB layer.
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Runs a block using inputs plugged into this node.
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Layer Properties

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Converts a layer into a 2D volume.
Light

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Transforms a layer to match a reference camera.
Median

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Mirror

Mirrors an image based on an arbitrary number of planes.
Mono

Convert a layer to Mono.
Mono to ID

Converts a Mono layer to an ID layer
Mono to RGB

Uses a ramp to convert a Mono Layer to RGB.
Mono to RGBA

Explicitly convertes a Mono layer to an RGBA Layer.
Mono to SDF

Computes a Signed Distance Field from an iso-level of a Mono layer.
Null

Passes inputs to the outputs.
OCIO Transform

Converts color spaces using OCIO transforms.
ONNX Inference

Applies inference from an ONNX Machine Learning model.
OpenCL

Executes an OpenCL kernel on layers.
Output

Collects the outputs of a subnetwork.
Polar to UV

Converts polar coordinate pixels to Cartesian pixels.
Position Map

Generates a Position Map.
Prefix Sum

Computes the prefix sum of a layer.
Premultiply

Premultiplies an RGBA layer.
Preview Material

Applies the preview material to geometry.
Project on Layer

Projects a layer onto a target layer.
Quantize

Quantizes input data into discrete steps.
RGB to RGBA

Converts RBG layers to RGBA.
RGB to UV

Splits an RGB layer into UV and Mono layers.
RGBA to RGB

Converts RBGBA layers to RGB.
RGBA to UV

Splits an RGBA layer into two UV layers.
ROP Image

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Ramp

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Creates a Mono layer with random values.
Random RGB

Creates a Mono layer with random values.
Rasterize Geometry

Rasterizes geometry onto a layer.
Rasterize Layer

Rasterizes a layer onto another layer’s camera.
Rasterize Setup

Prepares geometry for the Rasterize Geometry COP.
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Resample

Performs image scaling by changing the width, height and pixel sizes.
SDF Adjust

Modifies the values for a Mono SDF layer.
SDF Blend

Combines two Mono SDF layers.
SDF Shape

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Converts an SDF field to a Mono image layer.
SDF to RGB

Converts an SDF field to an RGB color layer.
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Imports SOP Geometry into Copernicus.
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Slap Comp Import

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Smooth Fill

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Streak Blur

Streaks an image, adding a motion blur effect.
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Used to organize a collection of COPs into one node.
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Switch If Wired

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Switch by Type

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Tile Pattern

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Transform 2D

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Transform 3D

Transforms a layer in 3D.
UV Map

Generates a UV Map.
UV Map by ID

Creates a UV Map for each connected ID island.
UV Sample

Samples an input layer using a UV layer.
UV Transform

Transforms the values of a UV layer in 2d space.
UV to Polar

Converts Cartesian coordinate pixels to polar coordinate pixels.
UV to RGB

Joins an UV and Mono layer into an RGB layer.
UV to RGBA

Joins two UV layers into an RGBA layer.
Vector Transform

Transforms values of an RGB layer in 3d space.
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Generates Worley noise.
Worley Noise 3D

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Z Composite

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