| 改进非下采样轮廓波在散斑条纹中的滤波处理 |
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| 引用本文： | 曹国强,刘禹廷,王琳霖.改进非下采样轮廓波在散斑条纹中的滤波处理[J].激光技术,2019,43(2):269-274. |
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| 作者姓名： | 曹国强 刘禹廷 王琳霖 |
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| 作者单位： | 沈阳航空航天大学 工程训练中心,沈阳,110136;沈阳航空航天大学 工程训练中心,沈阳,110136;沈阳航空航天大学 工程训练中心,沈阳,110136 |
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| 基金项目： | 辽宁省教育厅资助项目;辽宁省自然科学基金资助项目 |
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| 摘 要： | 为了改进传统多尺度变换滤波在电子散斑干涉(ESPI)条纹图中去噪效果和边缘细节保护不理想问题,提出改进非下采样轮廓波(NSCT)滤波算法。采用离散平稳小波变换和NSCT变换模型,联合非线性扩散和改进的快速非局部均值滤波算法,进行了理论分析和实验验证,取得了将本文中算法应用于模拟和实验ESPI条纹图滤波效果定量分析的数据。结果表明,本文中的算法在模拟ESPI条纹图和实验图相比其它算法散斑指数最小分别为0.41121,0.38043,0.35362,对应峰值信噪比最大;该算法在提升去噪能力的同时,能够更好地恢复条纹细节信息。研究结果为以后应用多尺度变换滤波在ESPI条纹图打下了基础。
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| 关 键 词： | 图像处理 电子散斑干涉技术 多尺度变换 非下采样轮廓波 快速非局部均值滤波 |
| 收稿时间： | 2018-05-02 |
Improvement of filtering processing of nonsubsampled contourlet transform in speckle stripes |
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| CAO Guoqiang,LIU Yuting,WANG Linlin.Improvement of filtering processing of nonsubsampled contourlet transform in speckle stripes[J].Laser Technology,2019,43(2):269-274. |
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| Authors: | CAO Guoqiang LIU Yuting WANG Linlin |
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| Affiliation: | (Engineering Training Studio, Shenyang Aerospace University, Shenyang 110136, China) |
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| Abstract: | In order to improve the denoising effect and the edge detail protection of traditional multi-scale transform filtering in the fringe pattern of electronic speckle pattern interferometry (ESPI), an improved nonsubsampling contourlet transform (NSCT) filtering algorithm was proposed.Discrete stationary wavelet transform and NSCT model were adopted with nonlinear diffusion and improved fast non local mean filtering algorithm.The algorithm was applied to the quantitative analysis of simulated and experimental ESPI fringe pattern filtering results.After theoretical analysis and experimental verification, the results show that, the minimum speckle index of the algorithm in this paper is 0.41121, 0.38043 and 0.35362 respectively in simulated and experimental ESPI fringe pattern.The peak signal-to-noise ratio is the largest.This algorithm improves the ability of denoising and recovers the details of stripes.The results lay the foundation for the application of multi-scale transform filtering in ESPI fringe pattern. |
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| Keywords: | image processing electronic speckle pattern interferometry multi-scale transformation nonsubsampled contourlet transform fast nonlocal mean filtering |
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