Lens Distort Copernicus node

Adds radial and tangential distortion to a layer based on OpenCV coefficients.

On this page	Parameters Inputs Outputs
Since	21.0

This node distorts an input layer based on the OpenCV-defined intrinsic camera parameters for lens distortion.

Use the parameters in this node to add radial and tangential distortion to the layer. Radial distortion (k# parameters) turns straight lines into circular arcs, while tangential distortion (p# parameters) moves pixels as if they're tilting along an axis to create linear displacement. For example, use this node to create a wide zoom effect or mirror effect where the image bulges outwards.

Refer to OpenCV documentation for more details on each of the constants in the intrinsic camera 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.

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

The k₁ radial distortion constant in the intrinsic camera parameters defined by OpenCV.

Positive values will produce a barrel distortion, and negative values will produce a pincushion distortion.

The k₂ radial distortion constant in the intrinsic camera parameters defined by OpenCV.

Positive values will produce a barrel distortion, and negative values will produce a pincushion distortion.

The k₃ radial distortion constant in the intrinsic camera parameters defined by OpenCV.

Positive values will produce a barrel distortion, and negative values will produce a pincushion distortion.

The k₄ radial distortion constant in the intrinsic camera parameters defined by OpenCV.

Negative values will produce a barrel distortion, and positive values will produce a pincushion distortion.

The k₅ radial distortion constant in the intrinsic camera parameters defined by OpenCV.

Negative values will produce a barrel distortion, and positive values will produce a pincushion distortion.

The k₆ radial distortion constant in the intrinsic camera parameters defined by OpenCV.

Negative values will produce a barrel distortion, and positive values will produce a pincushion distortion.

The p₁ tangential distortion constant in the intrinsic camera parameters defined by OpenCV.

Positive values will give the effect that the top of the image plane is farther away than the bottom, and negative values will do the opposite.

The p₂ tangential distortion constant in the intrinsic camera parameters defined by OpenCV.

Positive values will give the effect that the right side of the image plane is farther away than the left side, and negative values will do the opposite.

Center

The pivot point for the distortion.

Scale

The amount to scale the distortion along the X and Y-axes.

Aspect

The ratio between the width and height. This value should match your input layer’s aspect ratio. Use this when your image doesn’t have a 1:1 aspect ratio and you need to correct the distortion.

Inputs ¶

source

The original layer to distort.

An optional per-pixel scaling of the k1 coefficient.

An optional per-pixel scaling of the k2 coefficient.

An optional per-pixel scaling of the k3 coefficient.

An optional per-pixel scaling of the k4 coefficient.

An optional per-pixel scaling of the k5 coefficient.

An optional per-pixel scaling of the k6 coefficient.

An optional per-pixel scaling of the p1 coefficient.

An optional per-pixel scaling of the p2 coefficient.

center

An optional per-pixel addition to the Center parameter. This isn’t a scaling factor.

scale

An optional per-pixel scaling of the Scale parameter.

mask

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

Outputs ¶

distort

The distorted layer.

The UV map that represents the distortion.

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