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3D Shape Histograms for Similarity Search and Classification in Spatial Databases. Mihael Ankerst,Ga... - page 7 / 44

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Geometry Based Similarity Search

Spatial objects transformed into high dimensional vector space

In 2D shapes can be represented as ordered set of surface points, approx rectangular coverings etc.

Section Coding technique – each polygon’s circumcircle is decomposed into number of sectors, and each of these sectors are normalized.

Similarity is defined in terms of Euclidean distance between resulting feature vectors.

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