A Novel SURE-Based Criterion for Parametric PSF Estimation

A Novel SURE-Based Criterion for Parametric PSF Estimation
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一种新颖的基于 SURE 的参数 PSF 估计标准

DOI:
10.1109/tip.2014.2380174
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发表时间:
2015-02
影响因子:
10.6
通讯作者:
Thierry Blu
Thierry Blu
中科院分区:
计算机科学1区
文献类型:
--
作者:
Feng Xue;Thierry Blu

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我们提出了一个无偏估计的过滤版本的均方误差-模糊SURE(斯坦的无偏风险估计)-作为一种新的标准,用于估计一个未知的点扩散函数(PSF)从退化的图像。PSF是通过最小化这个新的目标函数在一个家庭的维纳处理。基于这个估计的模糊内核,我们然后使用我们最近开发的算法进行非盲反卷积。基于SURE的框架以许多参数PSF为例,涉及控制模糊大小的缩放因子。这种参数化的典型示例是高斯核。实验结果表明,最大限度地减少模糊SURE产生非常准确的估计的PSF参数,这也导致恢复质量,这是非常相似的一个获得的确切的PSF,当插入到我们最近的多维纳SURE-LET反卷积算法。高度竞争的结果,得到概述了发展更强大的盲反卷积算法的基础上SURE样估计的巨大潜力。
We propose an unbiased estimate of a filtered version of the mean squared error - the blur-SURE (Stein's unbiased risk estimate)-as a novel criterion for estimating an unknown point spread function (PSF) from the degraded image only. The PSF is obtained by minimizing this new objective functional over a family of Wiener processings. Based on this estimated blur kernel, we then perform nonblind deconvolution using our recently developed algorithm. The SURE-based framework is exemplified with a number of parametric PSF, involving a scaling factor that controls the blur size. A typical example of such parametrization is the Gaussian kernel. The experimental results demonstrate that minimizing the blur-SURE yields highly accurate estimates of the PSF parameters, which also result in a restoration quality that is very similar to the one obtained with the exact PSF, when plugged into our recent multi-Wiener SURE-LET deconvolution algorithm. The highly competitive results obtained outline the great potential of developing more powerful blind deconvolution algorithms based on SURE-like estimates.
DOI: 10.1109/tip.2008.2007354
发表时间: 2009
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