Ordinal Class Imbalance with Ranking

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2017

Autores

Cruz, R (Autor) Outra; Fernandes, K (Autor) Outra; Da Costa, JP (Autor) FCUP; Ortiz, MP (Autor) Outra; Jaime S Cardoso (Autor) FEUP

Ata de Conferência Internacional

Título: PATTERN RECOGNITION AND IMAGE ANALYSIS (IBPRIA 2017)

Páginas: 3-12

8th Iberian Conference on Pattern Recognition and Image Analysis (IbPRIA)

Univ Algarve, Faro, PORTUGAL, JUN 20-23, 2017

Indexação

ISI Web of Knowledge - 3 Citações

Scopus - 3 Citações

Outras Informações

ID Authenticus: P-00N-9XQ

DOI: 10.1007/978-3-319-58838-4_1

Abstract (EN): Classification datasets, which feature a skewed class distribution, are said to be class imbalance. Traditional methods favor the larger classes. We propose pairwise ranking as a method for imbalance classification so that learning compares pairs of observations from each class, and therefore both contribute equally to the decision boundary. In previous work, we suggested treating the binary classification as a ranking problem, followed by a threshold mapping to convert back the ranking score to the original classes. In this work, the method is extended to multi-class ordinal classification, and a new mapping threshold is proposed. Results are compared with traditional and ordinal SVMs, and ranking obtains competitive results.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 10