Opening and closings are examined in depth. The notion of structural opening, which constitutes a basis for the class of all openings (and likewise for closings) is introduced. A second important class of openings is constituted by the adjunctional openings. Annular openings, inf-overfilters and incidence structures are also explained.

Adjunctional openings and closings, Annular openings, Closings, Convex hull, Dominance, Granulometries, Incidence structures, Inf-overfilters, Openings, The non-Abelian case
Advances in Imaging and Electron Physics
Centrum Wiskunde & Informatica, Amsterdam, The Netherlands

Heijmans, H.J.A.M. (2020). Openings and closings. Advances in Imaging and Electron Physics, 216, 177–216. doi:10.1016/bs.aiep.2020.07.006