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A New Recurrent Plug-and-Play Prior Based on the Multiple Self-Similarity Network

, , , , and . IEEE Signal Processing Letters, (2020)
DOI: 10.1109/LSP.2020.2977214

Abstract

Recent work has shown the effectiveness of the plug-and-play priors (PnP) framework for regularized image reconstruction. However, the performance of PnP depends on the quality of image denoiser used as a prior. In this letter, we design a novel PnP denoising prior, called multiple self-similarity net (MSSN), based on the recurrent neural network (RNN) with self-similarity matching using multi-head attention mechanism. Unlike traditional neural net denoisers, MSSN exploits different types of relationships among non-local and repeating features to remove the noise in the input image. We numerically evaluate the performance of MSSN as a module within PnP for solving magnetic resonance (MR) image reconstruction. Experimental results show the stable convergence and excellent performance of MSSN for reconstructing images from highly compressive Fourier measurements.

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A New Recurrent Plug-and-Play Prior Based on the Multiple Self-Similarity Network - IEEE Journals & Magazine

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