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Tree-Based Integration of One-versus-Some (OVS) Classifiers for Multiclass Classification
Motivated by applications such as gene expression analysis, binary classification has achieved notable success. (e.g., cancer samples versus normal samples) When comes to multiclass classification, the extension is not straightforward. There has been two main directions on such extensions: 1) via a sequence of nested binary classifiers in a classification tree or 2) via classifier ensembles that integrate votes from all one-versus-all (OVA) classifiers or all all-pairs (AP) classifiers. In this article, we present a new way to combine both strategies in a multiclass classification
Radar-based Road User Classification and Novelty Detection with Recurrent Neural Network Ensembles
Radar-based road user classification is an important yet still challenging
task towards autonomous driving applications. The resolution of conventional
automotive radar sensors results in a sparse data representation which is tough
to recover by subsequent signal processing. In this article, classifier
ensembles originating from a one-vs-one binarization paradigm are enriched by
one-vs-all correction classifiers. They are utilized to efficiently classify
individual traffic participants and also identify hidden object classes which
have not been presented to the classifiers during training. For each classifier
of the ensemble an individual feature set is determined from a total set of 98
features. Thereby, the overall classification performance can be improved when
compared to previous methods and, additionally, novel classes can be identified
much more accurately. Furthermore, the proposed structure allows to give new
insights in the importance of features for the recognition of individual
classes which is crucial for the development of new algorithms and sensor
requirements.Comment: 8 pages, 9 figures, accepted paper for 2019 IEEE Intelligent Vehicles
Symposium (IV), Paris, France, June 201
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