6.4 Morphological Filtering

Morphological filtering is one type of processing in which the spatial form or structure of objects within an image is modified. Dilation, erosion and skeletonization are three fundamental morphological operations.

In this section, we first introduce binary image morphological filtering. Two types of connectivities are defined as following.

6.4.1 Binary image hit or miss transformations

6.4.2 Binary image generalized dilation and erosion

6.4.3. Binary image close and open operations

6.4.4 Grey scale image morphological filtering