measurement matrix
Learned D-AMP: Principled Neural Network based Compressive Image Recovery
Compressive image recovery is a challenging problem that requires fast and accurate algorithms. Recently, neural networks have been applied to this problem with promising results. By exploiting massively parallel GPU processing architectures and oodles of training data, they can run orders of magnitude faster than existing techniques. However, these methods are largely unprincipled black boxes that are difficult to train and often-times specific to a single measurement matrix. It was recently demonstrated that iterative sparse-signal-recovery algorithms can be ``unrolled'' to form interpretable deep networks.
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07cb5f86508f146774a2fac4373a8e50-AuthorFeedback.pdf
All error bars indicate 95% confidence intervals. We thank the reviewers for their positive comments and useful suggestions. "Are there cases where ERM outperforms We took this as a primitive and did not evaluate it in our submission. Note that as we reduce number of batches, MOM approaches ERM. Weakness 1: "Figure 1 should indicate MOM consistently achieve good reconstruction?
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Robust compressed sensing using generative models
We consider estimating a high dimensional signal in $\R^n$ using a sublinear number of linear measurements. In analogy to classical compressed sensing, here we assume a generative model as a prior, that is, we assume the signal is represented by a deep generative model $G: \R^k \rightarrow \R^n$. Classical recovery approaches such as empirical risk minimization (ERM) are guaranteed to succeed when the measurement matrix is sub-Gaussian. However, when the measurement matrix and measurements are heavy tailed or have outliers, recovery may fail dramatically. In this paper we propose an algorithm inspired by the Median-of-Means (MOM).
Learned D-AMP: Principled Neural Network based Compressive Image Recovery
Compressive image recovery is a challenging problem that requires fast and accurate algorithms. Recently, neural networks have been applied to this problem with promising results. By exploiting massively parallel GPU processing architectures and oodles of training data, they can run orders of magnitude faster than existing techniques. However, these methods are largely unprincipled black boxes that are difficult to train and often-times specific to a single measurement matrix. It was recently demonstrated that iterative sparse-signal-recovery algorithms can be ``unrolled'' to form interpretable deep networks.
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