| 基于四步相移的相位差提取方法 |
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| 引用本文： | 蔡长青,贺玲凤.基于四步相移的相位差提取方法[J].华南理工大学学报(自然科学版),2011,39(9):93-96. |
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| 作者姓名： | 蔡长青 贺玲凤 |
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| 作者单位： | 华南理工大学土木与交通学院,广东广州,510640 |
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| 摘 要： | 针对散斑干涉中的相位差提取问题,在四步相移的基础上提出了一种求解相位差的新方法.该方法通过采集物体变形前后的各4幅图像,从理论上推导出相位差的一种新的数学表达式,避免了一般四步相移法求解相位差时出现的高频噪声问题和得不到真实的相位差包裹值问题.用该方法进行周边固定中心加载的圆盘模型实验,并与一般的四步相移法作比较.结果...
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| 关 键 词： | 相位差提取 四步相移 散斑干涉术 噪声 |
Phase Difference Extraction Based on Four-Step Phase Shifting |
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| Cai Chang-qing,He Ling-feng.Phase Difference Extraction Based on Four-Step Phase Shifting[J].Journal of South China University of Technology(Natural Science Edition),2011,39(9):93-96. |
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| Authors: | Cai Chang-qing He Ling-feng |
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| Institution: | Cai Chang-qing He Ling-feng(School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,Guangdong,China) |
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| Abstract: | Aiming at the phase difference extraction in speckle pattern interferometry,a novel method is proposed based on the four-step phase shifting.In this method,by collecting the four interferometric patterns respectively before and after the object deforming,a novel mathematical expression of the phase difference is theoretically derived,which avoids the high-frequency noise and the false wrapped phase difference of the general four-step phase-shifting method.The proposed method is then tested by using a circum... |
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| Keywords: | phase difference extraction four-step phase shifting speckle pattern interferometry noise |
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