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. Author manuscript; available in PMC: 2022 Jun 10.
Published in final edited form as: Proc IAPR Int Conf Pattern Recogn. 2009 Jan 23;2008:10.1109/icpr.2008.4761744. doi: 10.1109/icpr.2008.4761744

Figure 1.

Figure 1

A four-phase level set partitioning, with two level set functions φ1 and φ2, for segmenting a grey level image u0. c = (c00, c01, c10, c11) represents the average gray-level values for various phases. H(φ1) and H(φ2) are the Heaviside functions associated with the level set functions.