Erosion Example


The erosion is one of the elementary operators of Mathematical Morphology, that is, it is one of the building blocks of a large class of operators.

The key mechanism under the erosion operator is the local comparison of a shape, called structural element, with the object that will be transformed. If, when positioned at a given point, the structural element is included in the object then this point will appear in the result of the transformation, otherwise not.

The figures below show an object and the result of its erosion by a 3x3 cross.

The figure below shows the original image (foreground in black and white, and background in blue), the transformed image (foreground in white), and structural element positioned in a critical point.

The figure below shows a more complex object and the result of its erosion by a digital disk.

The figures below show the input image, the transformed image and some structural elements in critical points.

The figures below show the effect of the erosion by the same disk used in the previous example.



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