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arXiv 1806.09810math.OCcs.ITmath.IT
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关于表示定理与凸正则化

On Representer Theorems and Convex Regularization

Claire Boyer, Antonin Chambolle, Yohann De Castro, Vincent Duval, Frédéric De Gournay, Pierre Weiss

摘要:

我们建立了一个一般原则,指出正则化的反问题与凸函数产生的解决方案是凸组合的一个小数目的原子。这些原子与正则化子水平集的极端射线的极值点和元素相标识。扩展到更广泛的类的准凸正则化也进行了讨论。作为一个附带结果,我们描述了总梯度变化的最小值,这仍然是一个未解决的问题。

英文摘要:

We establish a general principle which states that regularizing an inverse problem with a convex function yields solutions which are convex combinations of a small number of atoms. These atoms are identified with the extreme points and elements of the extreme rays of the regularizer level sets. An extension to a broader class of quasi-convex regularizers is also discussed. As a side result, we characterize the minimizers of the total gradient variation, which was still an unresolved problem.

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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