### 3.5. Mean Curvature Blur

#### 3.5.1. Overview

Figure 17.16. Example for the “Mean Curvature Blur” filter

Original image

Filter applied

Regularize geometry at a speed proportional to the local mean curvature value: this filter uses the mean curvature algorithm to blur the image preserving edges.

The Mean Curvature algorithm is described on Wikipedia.

#### 3.5.2. Activating the Filter

This filter is found in the main menu under Filters → Blur → Mean Curvature Blur….

#### 3.5.3. Options

Figure 17.17. “Mean Curvature Blur” filter parameters

Presets, “Input Type”, Clipping, Blending Options, Preview, Merge filter, Split view

  | Note
  These options are described in Section 2, “Common Features”.

Iterations

  Increasing Iterations increases blur.

#### 3.5.4. Examples

Original image

Iterations = 4

Mean Curvature Blur can be used to denoise an image:

Figure 17.18. Mean Curvature Blur to denoise

Original image

Iterations = 9

3.4. Lens Blur |  | 3.6. Median Blur

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