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A Convex Constraint Variational Method for Restoring Blurred Images in the Presence of Alpha-Stable Noises

机译:在α稳定噪声存在下恢复模糊图像的凸约束变分方法

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摘要

Blurred image restoration poses a great challenge under the non-Gaussian noise environments in various communication systems. In order to restore images from blur and alpha-stable noise while also preserving their edges, this paper proposes a variational method to restore the blurred images with alpha-stable noises based on the property of the meridian distribution and the total variation (TV). Since the variational model is non-convex, it cannot guarantee a global optimal solution. To overcome this drawback, we also incorporate an additional penalty term into the deblurring and denoising model and propose a strictly convex variational method. Due to the convexity of our model, the primal-dual algorithm is adopted to solve this convex variational problem. Our simulation results validate the proposed method.
机译:在各种通信系统中的非高斯噪声环境下,模糊图像的恢复提出了巨大的挑战。为了从模糊和阿尔法稳定噪声中恢复图像同时保留其边缘,本文提出了一种基于子午线分布和总变化量(TV)的变分方法,以具有阿尔法稳定噪声的模糊图像进行恢复。由于变分模型是非凸的,因此它不能保证全局最优解。为了克服这个缺点,我们还将一个额外的惩罚项纳入去模糊和去噪模型,并提出了一种严格的凸变分方法。由于我们模型的凸性,采用原始对偶算法来解决该凸变分问题。仿真结果验证了该方法的有效性。

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