Indexing planar point quartets via geometric attributes

Abstract

An index is devised to support position-independent search for images containing quartets of icons. Point quartets exist that do not unambiguously map to quadrilaterals, however, four points do unambiguously determine a set of six interpoint line segments. Values for the "size", "shape", and "orientation" attributes of an icon quartet can be derived as… (More)
DOI: 10.1145/1463434.1463516

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