Consider the following two sets of points (faces) shown in figures (a) and (b). The darker shading indicates a denser point distribution.

http://imgur.com/a/rlHCq

a) For each figure, could you use DBSCAN to find clusters corresponding to the patterns represented by the nose, eyes, and mouth? Explain.

b) For each figure, could you use K-means to find the patterns represented by the nose, eyes, and mouth? Explain.