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Robust Polyhedral Regularization

机译:强大的多面体正则化

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摘要

In this paper, we establish robustness to noise perturbations of polyhedral regularization of linear inverse problems. We provide a sufficient condition that ensures that the polyhedral face associated to the true vector is equal to that of the recovered one. This criterion also implies that the l~2 recovery error is proportional to the noise level for a range of parameter. Our criterion is expressed in terms of the hyperplanes supporting the faces of the unit polyhedral ball of the regularization. This generalizes to an arbitrary polyhedral regularization results that are known to hold for sparse synthesis and analysis l~1 regularization which are encompassed in this framework. As a byproduct, we obtain recovery guarantees for `1 and l~1 - l~∞ regularization.
机译:本文建立了线性逆问题多面体正则化噪声扰动的稳健性。我们提供了一种充分的条件,确保与真正的矢量相关联的多面体面等于回收的多面体面。该标准还意味着L〜2恢复误差与一系列参数的噪声水平成比例。我们的标准表达了支持正规化的单位多面体球面的面的超平面。这概括了已知用于稀疏合成的任意多面体正则化结果,并分析本框架中包含的L〜1正则化。作为副产品,我们获得了恢复保证,适用于`1和L〜1 - L〜∞正则化。

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