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. Author manuscript; available in PMC: 2011 Dec 21.
Published in final edited form as: Phys Med Biol. 2011 May 25;56(12):3669–3684. doi: 10.1088/0031-9155/56/12/014

Figure 3.

Figure 3

The distance between the two approximated patches PΦ and PΨ in the criterion vector p is determined by computing the minimal α such that p + αn is a point of the set confined by the approximation of PΨ.