Nodo Dilatar / Erosionar

Expands or shrinks a mask using a morphological operator.

Entradas

Máscara

Una imagen en escala de grises.

Propiedades

Modo

Intervalos

Sets each pixel to the maximum (for dilation) or minimum (for erosion) value that’s found within a square surrounding it. This approach keeps the original gray levels and is best suited for masks that contain sharp corners; rounded shapes such as circles will look more square-like in the output.

Despite the name, this is not an iterative process; the dilation/erosion is only performed once regardless of the chosen Distance.

Umbral

Makes all the pixels fully black or white depending on whether they’re darker or brighter than 50% gray. Then, sets each pixel to the maximum (for dilation) or minimum (for erosion) value that’s found within a circle surrounding it. This approach loses the original gray levels. Shape wise, it’s well-suited for masks that contain rounded corners; sharp ones will be rounded off.

Distancia

Sets each pixel to the maximum (for dilation) or minimum (for erosion) value that’s found within a circle surrounding it. This approach preserves the original gray levels and is well-suited for masks that contain rounded corners.

Esfumado

Blurs the image.

Distancia

The size of the surrounding area to look at for each pixel; or in other words, how much to dilate (for positive values) or erode (for negative values) the mask.

Borde

For the Threshold mode, determines how much to blur the edges after dilation/erosion.

Decaimiento

For the Feather mode, determines the brightness curve of the blurred edges.

Salidas

Máscara

The resulting mask.

Ejemplo

In the image below, notice that:

• The light gray disk has turned white and the dark gray rectangle has turned black because of the Threshold mode.

• The shapes have become thicker – dilated because of the positive Distance.

• The shapes appear blurred because of the positive Edge.