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Mathematica > Data Manipulation > Image Processing & Analysis > Mathematical Morphology >

Built-in Mathematica Symbol

Erosion

Erosion[image, ker]
gives the morphological erosion of image with respect to the structuring element ker.

Erosion[image, r]
gives the erosion with respect to a range-r square.

Erosion automatically adds zeros to structuring elements so that they have odd dimensions.

If multiple image channels are present, Erosion operates on each of them separately.

Erosion takes a Padding option that specifies the values to assume for pixels outside the image.

The default setting is Padding->1, corresponding to pixel value 1 for all channels.

Erosion[image, ker] interprets the structuring element so that Erosion[image, {{0, 0, 1}}] translates the image to the left.

Erosion reduces smaller light features:

Erosion of a grayscale image, using a disk-shaped structuring element:

Erosion of a grayscale photo:

Erosion operates on each color channel independently:

Erosion reduces smaller light features:

Erosion of a grayscale image, using a disk-shaped structuring element:

Erosion of a grayscale photo:

Erosion operates on each color channel independently:

Structuring elements are padded to odd dimensions, which can create artefacts at the right and bottom boundaries: