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arXiv 1502.06220cs.CVcs.NAmath.NA
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图像去噪算法的提升

Boosting of Image Denoising Algorithms

Technion – Israel Institute of Technology(以色列理工学院)

Yaniv Romano, Michael Elad

AI总结:

本文提出一种通用递归算法提升图像去噪方法,通过SOS流程增强信号、操作去噪方法并减去前一步结果,研究其收敛性并展示在K-SVD等算法中的改进效果。

摘要:

本文提出了一种通用递归算法,用于改进图像去噪方法。给定初始去噪图像,建议重复以下

英文摘要:

In this paper we propose a generic recursive algorithm for improving image denoising methods. Given the initial denoised image, we suggest repeating the following "SOS" procedure: (i) (S)trengthen the signal by adding the previous denoised image to the degraded input image, (ii) (O)perate the denoising method on the strengthened image, and (iii) (S)ubtract the previous denoised image from the restored signal-strengthened outcome. The convergence of this process is studied for the K-SVD image denoising and related algorithms. Still in the context of K-SVD image denoising, we introduce an interesting interpretation of the SOS algorithm as a technique for closing the gap between the local patch-modeling and the global restoration task, thereby leading to improved performance. In a quest for the theoretical origin of the SOS algorithm, we provide a graph-based interpretation of our method, where the SOS recursive update effectively minimizes a penalty function that aims to denoise the image, while being regularized by the graph Laplacian. We demonstrate the SOS boosting algorithm for several leading denoising methods (K-SVD, NLM, BM3D, and EPLL), showing tendency to further improve denoising performance.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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