基于非局部均值滤波增强的OTDR
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摘要
为解决OTDR测试曲线的信噪比受限问题,介绍了OTDR的基本原理和硬件结构,在此基础上采用1D和2D的非局部均值滤波算法对多次平均过后的测试曲线进行处理,提高了OTDR曲线的信噪比增益;引入Canny检测算法后来增强了对曲线事件识别的准确性和精度。
In order to solve the problem of signal-to-noise ratio limitation of OTDR test curves, the basic principle and hardware structure of OTDR are introduced. On this basis, nonlocal mean filtering algorithm of 1D and 2D are used to process the test curves after multiple averages, which improves the signal-to-noise ratio gain of OTDR curves. Canny detection algorithm is introduced to enhance the accuracy and accuracy of curve event recognition.
In order to solve the problem of signal-to-noise ratio limitation of OTDR test curves, the basic principle and hardware structure of OTDR are introduced. On this basis, nonlocal mean filtering algorithm of 1D and 2D are used to process the test curves after multiple averages, which improves the signal-to-noise ratio gain of OTDR curves. Canny detection algorithm is introduced to enhance the accuracy and accuracy of curve event recognition.
引文
[1]曾庆珠,徐智勇.基于Gabor算法的OTDR设计与研究[J].光通信技术,2017,41(12):37-40.
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[3]仇谷烽,高稚允.基于小波变换和最小二乘法的光纤衰减特性分析[J].光学技术,2000,26(5):464-466.
[4]ANDERSON D R,JOHNSON L,BELL F G,et al.Troubleshooting Optical Fiber Networks:Understanding and Using Optical Time-Domain Re-flectometers[M].Boston:Elsevier Academic Press,2004:13-58.
[5]刘晓明,田雨,何徽,等.一种改进的非局部均值图像去噪算法[J].计算机工程,2012,38(4):199-201.
[6]WU H,WANG L,ZHAO Z,et al.Brillouin optical time domain analyzer sensors assisted by advanced image denoising techniques.[J].Optics Express,2018,26(5):5126-5139.
[7]林卉,赵长胜,舒宁.基于Canny算子的边缘检测及评价[J].黑龙江工程学院学报,2003,17(2):3-6.
[2]陈剑斌,朱磊,刘玲.小波变换在OTDR事件分析中的应用[J].计算机应用与软件,2011,28(7):270-272.
[3]仇谷烽,高稚允.基于小波变换和最小二乘法的光纤衰减特性分析[J].光学技术,2000,26(5):464-466.
[4]ANDERSON D R,JOHNSON L,BELL F G,et al.Troubleshooting Optical Fiber Networks:Understanding and Using Optical Time-Domain Re-flectometers[M].Boston:Elsevier Academic Press,2004:13-58.
[5]刘晓明,田雨,何徽,等.一种改进的非局部均值图像去噪算法[J].计算机工程,2012,38(4):199-201.
[6]WU H,WANG L,ZHAO Z,et al.Brillouin optical time domain analyzer sensors assisted by advanced image denoising techniques.[J].Optics Express,2018,26(5):5126-5139.
[7]林卉,赵长胜,舒宁.基于Canny算子的边缘检测及评价[J].黑龙江工程学院学报,2003,17(2):3-6.