3.3. Mean Curvature Blur

3.3.1. Yleiskatsaus

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. Käynnistä suodin

You can find this filter in the image menu under FiltersBlurMean Curvature Blur…

3.3.3. Valinnat

Kuva 17.12. Mean Curvature Blur filter parameters

”Mean Curvature Blur” filter parameters

Presets, Preview, Split view

These options are common to GEGL-based filters. Please refer to Kohta 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

Alkuperäinen kuva

Iterations = 4

Mean Curvature Blur can be used to denoise an image:

Kuva 17.13. Mean Curvature Blur to denoise

Mean Curvature Blur to denoise

Alkuperäinen kuva

Mean Curvature Blur to denoise

Iterations = 9