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Description: 摘要:为了提高图像复原算法的性能 ,提出了一种改进的奇异值分解法估计图像的点扩散函数。从图像的退化离散模型
出发 ,对图像进行逐层分块奇异值分解 ,并自动选取奇异值重组阶数以减少噪声对估计的影响。利用理想图像奇异值向
量平均能谱指数模型 ,估计点扩散函数奇异值向量的频谱 ,再反傅里叶变换得到其时域结果。实验结果表明 ,该方法能
在不同信噪比情况下估计成像系统的点扩散函数 ,估计结果比原有估计方法有所提高 ,有望为图像复原算法的预处理提
供一种有效的手段。-Abstract : To improve the performance of image restoration algorithms , a modified Singular Value De2
[ ] [ ]
composition SVD method was proposed to estimate the Point Spread Function PSF of an imaging
system. Using the discrete image degradation model , a block2based SVD filter scheme was applied for
the image denoising with an automatically determined singular value rank. After the spectra of PSF
singular vectors were estimated under an exponential model for the averaged spectra of un2degraded
image singular vectors , the IFFT was used to get the time2domain estimation of the PSF. The experi2
mental results show that this proposed method can be applied to estimate the PSF of the imaging sys2
tem under a wide SNR range and its performance is better than the original method. It may be used as
an effective method for the image preprocessing in image restoration problems.
[ ]
Key words: image restoration Point Spread Function PSF block2based Singular Value Decomposi2
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Author: zy |
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Description: Rank Order filter implementation using Mfile
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Size: 2048 |
Author: gyanendra |
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Description: Vertical rank order filter figure
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Size: 758784 |
Author: gyanendra |
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Description: The research in this dissertation addresses reduced rank adaptive signal processing,
with speci c emphasis on the multistage Wiener lter (MWF). The MWF is a
generalization of the classical Wiener lter that performs a stage-by-stage decomposition
based on orthogonal projections. Truncation of this decomposition produces a
reduced rank lter with many bene ts, for example, improved performance.
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Author: mansoor |
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Description: 在matlab中利用层叠方法实现秩排序统计滤波器-Method in matlab using cascaded to achieve the rank order statistics filter
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Size: 1024 |
Author: 小品 |
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Description: 图像的三层小波变换、行列变换、高通滤波、低通滤波、反变换-Image of the three wavelet transform, rank transform, high pass filter, low pass filtering, inverse transform
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Size: 2713600 |
Author: 小紫英 |
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Description: 层叠滤波方法实现秩排序统计滤波器及其matlab实现-Cascade filter implementation matlab rank order statistic filter and its implementation
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Size: 1024 |
Author: 李维 |
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Description: Two-Dimensional Rank Order Filter
Author: Gabor Szedo
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Size: 537600 |
Author: tn |
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Description: A signal-dependent rank ordered mean (SD-ROM) filter-a new approach for removal of impulses from highly corrupted images
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Size: 1024 |
Author: yousif |
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Description: Arook多元搜索引擎，聚合国内各大搜索引擎的搜索结果，广告过滤，去除重复结果，按指定权重重新排列搜索结果，支持自定义引擎、权重、简单搜索语法。
Tags： Arook多元搜索-Arook of multiple search engines and polymerization of domestic each big search engine search results, ad filter, remove duplicate results, according to the specified weights to re rank the search results, support for custom engine, weight, simple search syntax.
Tags:Arook multiple search
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Size: 5043200 |
Author: zhou |
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