(3)Dp2p=1N∑i=1Nd(Pisource,Pitarget), where N and d denote the number of points and Euclidean distance, respectively, and Pisource is the corresponding point of Pitarget. Not only point-wise, but also global distance can be calculated, as well. Unlike the point-wise, the global distance appraises the displacement between the two comparing sets in whole. That means the discussed metric gives an overview of the similarities between the source set with the target. The global measurement of the distance results in reporting two distances: from the source to target PCL and from the target PCL to the source. Closer reported distances signify the more similarity between the two PCLs.