3.3. Mean Curvature Blur

3.3. Mean Curvature Blur
	3. Blur Filters

3.3.1. Overview

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.

Mean Curvature algorithm is describes in Wikipedia

3.3.2. Activate the filter

You can find this filter in the image menu under Filters → Blur → Mean Curvature Blur…

3.3.3. Options

Figure 17.12. “Mean Curvature Blur” filter parameters

Presets, Preview, Split view: These options are common to GEGL-based filters. Please refer to Section 2, “Common Features”.
Iterations: Increasing Iterations increases blur.
Clipping: The result of this filter can be larger than the original image. With the default Adjust option, the layer will be automatically resized as necessary when the filter is applied. With the Clip option the result will be clipped to the layer boundary.

3.3.4. Examples

Original image

Iterations = 4

Mean Curvature Blur can be used to denoise an image:

Figure 17.13. Mean Curvature Blur to denoise

Original image

Iterations = 9