Partial shape matching using convex hull and Fourier descriptors

Abstract

An application of Fourier descriptors and convex hull for shape analysis is presented. Convex hull is used for dividing a shape into small parts. Amplitude spectrum which is invariant to scaling, translation and choosing a starting point is obtained from the Fourier descriptors (see e.g [1-3]) and used for comparison. All calculations are performed with the author's software and some algorithms from literature [1,4]. For convex hull estimation the Graham algorithm is used.