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. Author manuscript; available in PMC: 2014 Aug 18.
Published in final edited form as: Microsc Microanal. 2013 Feb 15;19(2):433–450. doi: 10.1017/S1431927612014250

Figure 9.

Figure 9

(a) A vessel-enhanced image frame of Dataset 6, (b) skeletonizations of vessels with hysthigh = 0.1, and (c) skeletonizations of vessels with hysthigh = 0.05 compares the effect of the upper hysteresis threshold, hysthigh, on skeletonizations of vessels. Samples are generated directly on these skeletonizations and used in building SC descriptors. (c) Sampling on skeletonizations of vessels in a majority of the image frame area will lead to the construction of meaningful SCs and smoother deformation fields. A lack of sampling on absent skeletonizations in most of the image frame in b will lead to abnormal deformation fields. See the discussion in the Results section.