Houdini 21.0 Nodes Copernicus nodes

Color Correct Copernicus node

Adjusts colors in the image.

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Since 21.0

This node applies a variety of color corrections to the image, which you can independently control for the shadow, midtone, and highlight regions of the image. The node first applies the Shadow, Midtone, and Highlight parameters, combines their results, and then applies the Master parameters.

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. You can also set the RGBA channels to which you apply the effects of this node.

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

Toggle RGB

Turns the Red, Green, and Blue channels on and off.

Red

Applies this node’s effects to the Red channel.

Green

Applies this node’s effects to the Green channel.

Blue

Applies this node’s effects to the Blue channel.

Alpha

Applies this node’s effects to the Alpha channel.

Treat RGBA as Premultiplied

Treats RGBA as premultiplied, which multiplies the red, green, and blue channels by the alpha channel.

Master

Master

Applies the master adjustments to the combined image after the Shadow, Midtone, and Highlight color corrections.

Master Add

The amount to offset the incoming values. Positive values brighten the image and negative values darken the image. This affects the pixels of all values.

Master Mult

The amount to scale the incoming values. Values greater than 1 brighten the image, while values between 0 and 1 darken the image. This also affects pixels at the white point (value of 1).

Master Gamma

Take the incoming values to the specified power. Values greater than 1 often darken the image, while values between 0 and 1 brighten the image. This doesn’t change pixels at the white or black points (values of 1 and 0, respectively).

Master Contrast

Adjust the pixels depending on how they compare to the middle gray value, which boosts the distance of each pixel from 0.5. Larger values increase this boosting effect. A value of 1 results in no adjustment and a value of 0 destroys any contrast in the image, producing 0.5 for every pixel.

Shadow

Shadow

Adds the shadow component of the image to the final result. This component’s weight is calculated as exp(-7*t^2), where t is the original color.

Shadow Add

The amount to offset the incoming values. Positive values brighten the image and negative values darken the image. This affects the pixels of all values.

Shadow Mult

The amount to scale the incoming values. Values greater than 1 brighten the image, while values between 0 and 1 darken the image. This also affects pixels at the white point (value of 1).

Shadow Gamma

Take the incoming values to the specified power. Values greater than 1 often darken the image, while values between 0 and 1 brighten the image. This doesn’t change pixels at the white or black points (values of 1 and 0, respectively).

Shadow Contrast

Adjust the pixels depending on how they compare to the middle gray value, which boosts the distance of each pixel from 0.5. Larger values increase this boosting effect. A value of 1 results in no adjustment and a value of 0 destroys any contrast in the image, producing 0.5 for every pixel.

Midtone

Midtone

Adds the midtone component of the image to the final result. This component’s weight is calculated as exp(-7*(1-t)^2), where t is the original color.

Mid Add

The amount to offset the incoming values. Positive values brighten the image and negative values darken the image. This affects the pixels of all values.

Mid Mult

The amount to scale the incoming values. Values greater than 1 brighten the image, while values between 0 and 1 darken the image. This also affects pixels at the white point (value of 1).

Mid Gamma

Take the incoming values to the specified power. Values greater than 1 often darken the image, while values between 0 and 1 brighten the image. This doesn’t change pixels at the white or black points (values of 1 and 0, respectively).

Mid Contrast

Adjust the pixels depending on how they compare to the middle gray value, which boosts the distance of each pixel from 0.5. Larger values increase this boosting effect. A value of 1 results in no adjustment and a value of 0 destroys any contrast in the image, producing 0.5 for every pixel.

Highlight

Highlight

Adds the highlight component of the image to the final result. This component’s weight is equal to 1-exp(-7*t^2)-exp(-7*(1-t)^2), where t is the original color.

Highlight Add

The amount to offset the incoming values. Positive values brighten the image and negative values darken the image. This affects the pixels of all values.

Highlight Mult

The amount to scale the incoming values. Values greater than 1 brighten the image, while values between 0 and 1 darken the image. This also affects pixels at the white point (value of 1).

Highlight Gamma

Take the incoming values to the specified power. Values greater than 1 often darken the image, while values between 0 and 1 brighten the image. This doesn’t change pixels at the white or black points (values of 1 and 0, respectively).

Highlight Contrast

Adjust the pixels depending on how they compare to the middle gray value, which boosts the distance of each pixel from 0.5. Larger values increase this boosting effect. A value of 1 results in no adjustment and a value of 0 destroys any contrast in the image, producing 0.5 for every pixel.

Inputs

source

The original layer to color correct.

mask

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

Outputs

correct

The source image with color correction applied.

See also

Copernicus nodes