Closing (morphology)

In mathematical morphology, the closing of a set (binary image) A by a structuring element B is the erosion of the dilation of that set, In mathematical morphology, the closing of a set (binary image) A by a structuring element B is the erosion of the dilation of that set, where ⊕ {displaystyle oplus } and ⊖ {displaystyle ominus } denote the dilation and erosion, respectively. In image processing, closing is, together with opening, the basic workhorse of morphological noise removal. Opening removes small objects, while closing removes small holes.