Σύγκριση μεθόδων

	Mean Shift	Ομαδοποίηση K-means
Πεδίο	Μηχανική Μάθηση	Μηχανική Μάθηση
Οικογένεια	Machine learning	Machine learning
Έτος προέλευσης	1975	1967 (formalized 1982)
Δημιουργός	Fukunaga, K. & Hostetler, L. D.; extended by Comaniciu, D. & Meer, P.	MacQueen, J. B.; Lloyd, S. P.
Τύπος	Non-parametric mode-seeking / density-based clustering	Partitional clustering
Θεμελιώδης πηγή	Fukunaga, K. & Hostetler, L. D. (1975). The estimation of the gradient of a density function, with applications in pattern recognition. IEEE Transactions on Information Theory, 21(1), 32–40.	Lloyd, S. P. (1982). Least squares quantization in PCM. IEEE Transactions on Information Theory, 28(2), 129–137.
Εναλλακτικές ονομασίες	mean-shift clustering, mean shift mode seeking, kernel mean shift, nonparametric mode detection	k-means clustering, Lloyd's algorithm, k-means partitioning, hard k-means
Συναφείς	4	4
Σύνοψη	Mean Shift is a non-parametric, iterative mode-seeking algorithm that identifies clusters as the peaks of an underlying probability density function. Originally introduced by Fukunaga and Hostetler (1975) for gradient estimation in pattern recognition, it was substantially extended and popularized by Comaniciu and Meer (2002) for robust feature-space analysis and image segmentation. Unlike k-means, Mean Shift requires no prior specification of the number of clusters, deriving cluster structure entirely from the data density.	K-means is a classic unsupervised partitional clustering algorithm that divides a dataset into K non-overlapping groups by iteratively assigning each observation to its nearest centroid and updating centroids as the mean of their assigned points. It is one of the most widely used exploratory tools in machine learning and data analysis.