Local Image Structure

Local image properties are those that can be associated with a single base point at a fixed inner scale, i.e. that can be defined in terms of derivatives taken at a fixed point in scale-space. Multilocal properties take into account multiple local neighbourhoods. (Note that certain multilocal properties may have a local interpretation at a coarser level of scale or at a higher order of differentiation.) Local properties are the building blocks on the basis of which multilocal expertise must be built. Indeed, the very scale-space construct is intended to encompass global structure as a manifestation of purely local entities that are causally connected in a continuous tree-like structure (“dynamic shape” [162]).