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Hirotaka Kaji

3 accepted papers

2020

Binary Classification from Positive Data with Skewed Confidence

IJCAI 2020poster

Positive-confidence (Pconf) classification [Ishida et al., 2018] is a promising weakly-supervised learning method which trains a binary classifier only from positive data equipped with confidence. However, in practice, the confidence may be skewed by bias arising in an annotation process. The Pconf…

Cited by 0SourcePDFScholar
2019

Binary Classification Only from Unlabeled Data by Iterative Unlabeled-unlabeled Classification

ICASSP 2019accepted

Unlabeled-unlabeled (UU) classification (du Plessis et al. 2013) allows us to train a binary classifier from two sets of unlabeled data with different class priors. In this paper, we go beyond this scenario and try to train a binary classifier only from a single set of unlabeled data. Our key idea i…

Cited by 0SourceScholar
2018

Multi Task Learning with Positive and Unlabeled Data and its Application to Mental State Prediction

ICASSP 2018accepted

In real-world machine learning applications, we are often faced with a situation where only a small number of training samples is available due to high sampling costs. For instance, prediction of mental states such as drowsiness from physiological information is a typical example. To cope with this…

Cited by 0SourceScholar