See also the following links:

▎ENGLISH

On DBSCAN
▸ https://shritam.medium.com/how-dbscan-algorithm-works-2b5bef80fb3

Comparison between the DBSCAN and k-Means algorithms
▸ https://www.geeksforgeeks.org/difference-between-k-means-and-dbscan-clustering/

▎日 本 語