# Gaussian Blur

Class: NodeSimpleGaussian

Computes the smoothing of an image by convolution with a Gaussian kernel. This node uses two ITK filters depending on the selected algorithm: SmoothingRecursive or Discrete. If any dimension of the input matrix is <4, the Discrete algorithm must used.

## Inputs

#### Image

Input image.

Type: Image4DFloat, Required, Single

## Outputs

#### Output

Resulting image.

Type: Image4DFloat

## Settings

#### Algorithm Selection

Sets the algorithm to use for the filter.

Values: SmoothingRecursive, Discrete

#### Sigma Number

Set Sigma value. Sigma is measured in the units of image spacing.