Morphology Edges

Mathematical morphology is a method of processing digital images on the basis of shape. Morphing is available during the working over images. Morphology Edges allows to find the edges with morphological operators, by subtracting the eroded image from the dilated image. Radius and shape of a structuring element for the erode and dilate operators are specified by correspoding controls.

To use the Morphology Edges filter:

Choose Filters > Edges > Morphology Edges