Overridden to define the mask of Neighborhoods that have one
(neighborhood: StringAdd).self
(neighborhood: StringFormat).self
(neighborhood: ArrowAssoc[Neighborhood]).x
(Since version 2.10.0) Use leftOfArrow
instead
(neighborhood: Ensuring[Neighborhood]).x
(Since version 2.10.0) Use resultOfEnsuring
instead
A definition of the shape and size of the neighborhood (or kernel) to be used in a focal operation.