手法を比較

	半教師あり K-means	DBSCAN
分野	機械学習	機械学習
系統	Machine learning	Machine learning
提唱年	2001–2002	1996
提唱者	Wagstaff, K. et al. (constrained); Basu, S. et al. (seeded)	Ester, M., Kriegel, H.-P., Sander, J. & Xu, X.
種類	Semi-supervised clustering	Density-based clustering algorithm
原典	Wagstaff, K., Cardie, C., Rogers, S., & Schroedl, S. (2001). Constrained K-means Clustering with Background Knowledge. In Proceedings of the 18th International Conference on Machine Learning (ICML 2001), pp. 577–584.	Ester, M., Kriegel, H.-P., Sander, J. & Xu, X. (1996). A Density-Based Algorithm for Discovering Clusters in Large Spatial Databases with Noise. Proceedings of the 2nd KDD, 226–231.
別名	constrained K-means, seeded K-means, partially supervised K-means, SS-K-means	DBSCAN Kümeleme, density-based clustering, density-based spatial clustering
関連	5	3
概要	Semi-supervised K-means extends standard K-means clustering by incorporating partial supervision — either a small set of labeled seed points or pairwise must-link and cannot-link constraints — to guide cluster formation. It bridges unsupervised clustering and fully supervised classification, enabling more meaningful clusters when labels are scarce but costly to obtain in full.	DBSCAN is a density-based clustering algorithm, introduced by Ester, Kriegel, Sander and Xu in 1996, that groups together points lying in dense regions and flags points in sparse regions as noise. It is effective on noisy data and on clusters of irregular, non-spherical shapes.