arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1503.01436cs.LGcs.CGstat.ML
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基于微分几何正则化的类概率估计

Class Probability Estimation via Differential Geometric Regularization

Boston University(波士顿大学);The Mathworks Inc.(Mathworks公司)

Qinxun Bai, Steven Rosenberg, Zheng Wu, Stan Sclaroff

摘要:

我们从统一的几何角度研究了二分类和多分类的监督学习问题。特别是,我们提出了一种几何正则化技术,找到相应的类概率$P(y|\pmb{x})$的鲁棒估计的子流形。正则化项测量这个子流形的体积,基于过拟合产生快速局部振荡的直觉,因此估计量很大。这种技术可以应用于正则化满足两个要求的任何分类函数:首先,可以获得类概率的估计;其次,可以计算类概率估计的一阶和二阶导数。在实验中,我们将我们的正则化技术应用于标准损失函数进行分类,我们基于RBF的实现与广泛使用的正则化方法进行二进制和多类分类相比毫不逊色。

英文摘要:

We study the problem of supervised learning for both binary and multiclass classification from a unified geometric perspective. In particular, we propose a geometric regularization technique to find the submanifold corresponding to a robust estimator of the class probability $P(y|\pmb{x})$. The regularization term measures the volume of this submanifold, based on the intuition that overfitting produces rapid local oscillations and hence large volume of the estimator. This technique can be applied to regularize any classification function that satisfies two requirements: firstly, an estimator of the class probability can be obtained; secondly, first and second derivatives of the class probability estimator can be calculated. In experiments, we apply our regularization technique to standard loss functions for classification, our RBF-based implementation compares favorably to widely used regularization methods for both binary and multiclass classification.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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