3.3. Desenfoque de curvatura media

3.3.1. Visión general

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. Activar el filtro

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

3.3.3. Opciones

Figura 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 Sección 2, “Características comunes”.

Iteraciones

Increasing Iterations increases blur.

Recortado

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. Ejemplos

Imagen original

Iteraciones = 4

Mean Curvature Blur can be used to denoise an image:

Figura 17.13. Mean Curvature Blur to denoise

Mean Curvature Blur to denoise

Imagen original

Mean Curvature Blur to denoise

Iteraciones = 9