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Nov, 2011
非本地平均算法对于具有尖锐边缘的图像的次优性
Suboptimality of Nonlocal Means for Images with Sharp Edges
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Arian Maleki, Manjari Narayan, Richard G. Baraniuk
TL;DR
研究了一种非局部均值图像去噪算法在水平类图像中的渐近风险分析及其性能，并证明其在经过最优调节后的均方风险衰减速率优于线性卷积滤波器、中值滤波器和SUSAN滤波器，但仍低于最优的极小值率。
Abstract
We conduct an
asymptotic risk analysis
of the nonlocal means
image denoising
algorithm for the Horizon class of images that are piecewise constant with a sharp edge discontinuity. We prove that the
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