Improving the Accuracy of Least-Squares Probabilistic Classifiers
Improving the Accuracy of Least-Squares Probabilistic Classifiers
复制标题
提高最小二乘概率分类器的准确性
DOI:
10.1587/transinf.e94.d.1337
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发表时间:
2010
期刊:
影响因子:
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通讯作者:
J. Simm
中科院分区:
文献类型:
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作者:
M. Yamada;Masashi Sugiyama;G. Wichern;J. Simm
The least-squares probabilistic classifier (LSPC) is a computationally-efficient alternative to kernel logistic regression. However, to assure its learned probabilities to be non-negative, LSPC involves a post-processing step of rounding up negative parameters to zero, which can unexpectedly influence classification performance. In order to mitigate this problem, we propose a simple alternative scheme that directly rounds up the classifier's negative outputs, not negative parameters. Through extensive experiments including real-world image classification and audio tagging tasks, we demonstrate that the proposed modification significantly improves classification accuracy, while the computational advantage of the original LSPC remains unchanged.
DOI:
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发表时间:
2007
期刊:
影响因子:
--
作者:
阿部;和子
通讯作者:
和子