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. Author manuscript; available in PMC: 2021 Jan 18.
Published in final edited form as: IEEE Trans Vis Comput Graph. 2017 Jan;23(1):751–760. doi: 10.1109/TVCG.2016.2598791

Fig. 13: Registration problems with the Lai et al. [16] algorithm.

Fig. 13:

Due to the dependence of the Lai et al. registration on correctly detecting flexures, the average distance registration error increases with any ε > 0 if the flexures are not detected correctly on the corresponding colon pairs. The black circles indicate the local maximum z-coordinates as per their approach, and we use ε = 0.05 to compute the corresponding points on the prone/side model. In (b), two local maximum z-coordinates are detected, instead of one (which is the Lai et al. assumption). In (f) the arrow shows the corresponding actual location on the side colon for the point detected in the supine model (e).