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arXiv 1908.01010eess.IVcs.LGstat.ML
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图像复原中随机不确定性的概率残差学习

Probabilistic Residual Learning for Aleatoric Uncertainty in Image Restoration

Chen Zhang, Bangti Jin

摘要:

任意不确定性是不适定逆问题和成像问题的一种内在性质。其量化对于评估相关点估计的可靠性至关重要。在本文中,我们提出了一个有效的框架,用于量化深度残差学习的任意不确定性,并展示了其在图像恢复方面的巨大潜力。在该框架中,我们将残差变量的条件概率建模分为确定性同维层、随机低维层和合并层。低维性特别适合于图像像素之间的稀疏相关性,使高维问题的有效采样成为可能,并充当分布的正则化器。初步的数值实验表明,所提出的方法不仅可以给国家的最先进的点估计的图像恢复,但也有用的相关的不确定性信息。

英文摘要:

Aleatoric uncertainty is an intrinsic property of ill-posed inverse and imaging problems. Its quantification is vital for assessing the reliability of relevant point estimates. In this paper, we propose an efficient framework for quantifying aleatoric uncertainty for deep residual learning and showcase its significant potential on image restoration. In the framework, we divide the conditional probability modeling for the residual variable into a deterministic homo-dimensional level, a stochastic low-dimensional level and a merging level. The low-dimensionality is especially suitable for sparse correlation between image pixels, enables efficient sampling for high dimensional problems and acts as a regularizer for the distribution. Preliminary numerical experiments show that the proposed method can give not only state-of-the-art point estimates of image restoration but also useful associated uncertainty information.

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