采用自适应可靠因子的联合双边散斑条纹滤波方法  

A joint bilateral filtering method based on adaptive reliable factor for fringe patterns of electronic speckle pattern Interferometry

作　　者：王会峰[1] 何柱材 李云梦 黄鹤[1] 高荣[1] Wang Huifeng;He Zhucai;Li Yunmeng;Huang He;Gao Rong(School of Electronic and Control Engineering,Chang′an University,Xi'an 710064,China)

机构地区：[1]长安大学电子与控制工程学院,西安710064

出　　处：《仪器仪表学报》2021年第12期18-29,共12页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(52172324);陕西省重点研发计划项目(2021GY-285,2021SF-483)资助。

摘　　要：在基于电子散斑干涉法的测量系统中,干涉条纹常常会存在大量噪声从而影响后续相位的提取。为解决双边滤波无法处理大噪声的问题,提出了一种融合加窗傅里叶滤波的联合双边滤波方法并用于处理存在高噪声的电子散斑干涉条纹。在该方法中,引入加窗傅里叶初步滤波后的图像作为联合双边滤波的导向图,并构建更可靠的自适应像素值相似度因子,从而提供更可靠的引导信息和更好的滤波效果。该方法被应用到高、中、低、可变密度4种不同密度的模拟条纹和实验采集到的大噪声条纹上,并将其与原始双边滤波和加窗傅里叶滤波相对比。实验结果表明:与其它滤波方法相比,该方法得到的条纹最光滑,结构最完整。对本文模拟的条纹滤波后峰值信噪比提高1.0~4.2 dB,结构相似度和边缘保持指数最高,相位的均方误差最小。所提出的方法调整更方便,对330×330大小的模拟条纹处理时间仅为4 s左右。In the measurement of electronic speckle pattern interferometry,interference fringes contain much noise that affects the subsequent phase extraction.To solve the problem that the bilateral filtering cannot effectively remove high noise,a joint bilateral filtering combined with the windowed Fourier filtering is proposed to deal with electronic speckle pattern interferometry fringes with high noise.In the method,an image after initial processing by the windowed Fourier filtering is introduced as the guiding map of the joint bilateral filtering.Then,an improved similarity factor of pixel value is introduced to provide more reliable guiding information and better filtering effect.The proposed method is applied to four different simulated electronic speckle pattern interferometry fringes with high,medium,low and variable densities and the real electronic speckle pattern interferometry fringes with high noise.In addition,the proposed method is compared with the bilateral filtering and the windowed Fourier filtering.Experimental results show that the fringe obtained by joint bilateral filtering is smoothest,and the structure is the most complete.The peak signal to noise ratio of the simulated fringe filtered by the new method is improved by 1.0~4.2 dB,the structural similarity index and edge preservation index are the highest,and the mean square error of the phase is the smallest.In addition,the proposed method is more convenient to adjust,and the calculation time for a 330×330 simulated fringe is only about 4 s.

关 键 词：电子散斑干涉术 图像处理 联合双边滤波 加窗傅里叶滤波 散斑条纹噪声 

分 类 号：TH741[机械工程—光学工程] TP391[机械工程—仪器科学与技术]