Fig. 4

CPE module provides more accurate results compared to manual segmentation. a Contact distances from axis are on average similar between manual (blue) and automatic (red) segmentation. In general automatic segmentation performs better in keeping all contacts aligned to their axis. Probability distribution shows that the paired differences of automatical and manual defined contact to their axis is signficantly (p < 0.05, paired wilcoxon test) smaller than zero. As expected, manual segmentation yields higher variability and a larger fraction of outliers. b Inter-Contact distributions show gaussian-like distributions. Probability distribution of paired difference of automatic and manually defined contacts shows that our method significantly (p < 0.05) out performs compared to the manual case in representing real inter-contact distance. Finally, automatic segmentation shows a smaller variability compared to manual segmentation