Journal
JOURNAL OF MATHEMATICAL IMAGING AND VISION
Volume 56, Issue 3, Pages 430-440Publisher
SPRINGER
DOI: 10.1007/s10851-016-0647-7
Keywords
Image reconstruction; Magnetic resonance; Block matching; BM3D; Compressed sensing; Sparsity
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The block matching 3D (BM3D) is an efficient image model, which has found few applications other than its niche area of denoising. We will develop a magnetic resonance imaging (MRI) reconstruction algorithm, which uses decoupled iterations alternating over a denoising step realized by the BM3D algorithm and a reconstruction step through an optimization formulation. The decoupling of the two steps allows the adoption of a strategy with a varying regularization parameter, which contributes to the reconstruction performance. This new iterative algorithm efficiently harnesses the power of the nonlocal, image-dependent BM3D model. The MRI reconstruction performance of the proposed algorithm is superior to state-of-the-art algorithms from the literature. A convergence analysis of the algorithm is also presented.
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