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Title: | Um breve estudo sobre o algoritmo K-means | Authors: | Nunes, Diogo Henriques Freitas | Orientador: | Santos, José Luis Esteves dos | Keywords: | Clustering; Clusters; K-means; Expectation-Maximization; Kernel K-means | Issue Date: | 5-Jul-2016 | Abstract: | Este trabalho teve como objetivo aprofundar o conhecimento de uma ferramenta de data mining conhecida como o clustering. Optou-se por direcionar este estudo para um algoritmo de clustering clássico, o K-means, e prova-se a sua convergência. Complementarmente apresentam-se outros
dois algoritmos, o Expetation-Maximization e o Kernel K-means, e realizam-se testes de desempenho entre os três. No final aplicaram-se estes algoritmos a vários tipos de problemas nomeadamente no campo da segmentação de imagens. The objective of this work was to understand a data mining technique known as clustering. Particulary, this work was focused on a classic algorithm known as K-means and demonstrating its convergence. To understand its potential two more classic algorithms were studied, named Expetation-Maximization and Kernel K-means and their respective performances were tested and compared. Finally, these algorithms were applied on image segmentation. |
URI: | http://hdl.handle.net/10316/48034 | Rights: | openAccess |
Appears in Collections: | FCTUC Matemática - Teses de Mestrado UC - Dissertações de Mestrado |
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Tese_DiogoNunes.pdf | 1.96 MB | Adobe PDF | View/Open |
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