Difference
131Difference hierarchy — In set theory, the difference hierarchy over a pointclass is a hierarchy of larger pointclasses generated by taking differences of sets. If Γ is a pointclass, then the set of differences in Γ is . In usual notation, this set is denoted by 2 Γ.… …
132Difference of Gaussian — Helligkeitsänderung einer Kante Verlauf der 2. Ableitung an der Kante Der Marr Hildreth Operator oder Laplacian of Gaussian (LoG) ist eine spezielle Form eines diskreten Laplace Filters …
