3.3. Mean Curvature Blur

3.3.1. Общая информация

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. Активация фильтра

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

3.3.3. Параметры

Рисунок 17.12. «Mean Curvature Blur» filter parameters

Mean Curvature Blur filter parameters

Профили, Предварительный просмотр, Сравнение до/после

Эти параметры являются общими для фильтров на базе GEGL. Прочитайте Раздел 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:

Рисунок 17.13. Mean Curvature Blur to denoise

Mean Curvature Blur to denoise

Original image

Mean Curvature Blur to denoise

Iterations = 9