@article {Rohwer:1 June 2002:1607-3606:135,
	author = "Rohwer, C.H.",
	author = "Wild, M.",
	title = "Natural Alternatives For One Dimensional Median Filtering",
	journal = "Quaestiones Mathematicae",
	volume = "25",
	year = "1 June 2002",
	abstract = "For practical purposes median smoothers have often been considered the basic components for the construction of simple non-linear smoothers for removing impulsive noise before any subsequent linear signal extraction from a sequence. Alternatives exist that are computationally convenient, conceptually simpler and provide significant insight into the removal of impulsive noise of chosen briefness. Deriving these, so called<I> LU LU</I>-operators, from the simplest rank selectors provides a simpler proof structure that provides significant additional insight for analysis and comparison of similar smoothers. From an algebraic point of view, an interesting finite, partially ordered, idempotent semigroup arises.",
	pages = "135-162(28)",
	url = "http://www.ingentaconnect.com/content/nisc/qm/2002/00000025/00000002/art00001"
}