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. Author manuscript; available in PMC: 2009 Sep 21.
Published in final edited form as: Pattern Recognit Lett. 2007;28(13):1781–1787. doi: 10.1016/j.patrec.2007.05.008

Fig. 3.

Fig. 3

Kernel topography: (a–e) Evolving kernel for the detection of radial symmetries (shown at a fixed orientation) has a trapezoidal active area with Gaussian distribution along both axes.