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Alternating Minimization Algorithms for Convex Minimization Problem with Application to Image Deblurring and Denoising

机译:凸最小化问题的交替最小化算法及其在图像去模糊和去噪中的应用

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In this paper, we propose algorithm to restore blurred and noisy images based on the discretized total variation minimization technique. The proposed method is based on an alternating technique for image deblurring and denoising. Start by finding an approximate image using a Tikhonov regularization method. This corresponds to a deblurring process with possible artifacts and noise remaining. In the denoising step, we use fast iterative shrinkage-thresholding algorithm (SFISTA) or fast gradient-based algorithm (FGP). Besides, we prove the convergence of the proposed algorithm. Numerical results demonstrate the efficiency and viability of the proposed algorithm to restore the degraded images.
机译:在本文中,我们提出了一种基于离散总变化最小化技术的模糊和噪声图像恢复算法。所提出的方法基于用于图像去模糊和去噪的交替技术。首先使用Tikhonov正则化方法查找近似图像。这对应于具有可能的伪像和噪声残留的去模糊处理。在降噪步骤中,我们使用快速迭代收缩阈值算法(SFISTA)或基于快速梯度的算法(FGP)。此外,我们证明了该算法的收敛性。数值结果证明了所提算法对退化图像的复原效率和可行性。

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