| 提高窗口傅立叶变换精度的方法 |
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| 引用本文： | 付艳华,陈文静.提高窗口傅立叶变换精度的方法[J].四川激光,2010(4):33-34. |
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| 作者姓名： | 付艳华 陈文静 |
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| 作者单位： | [1]湖北汽车工业学院理学系,湖北十堰442002 [2]四川大学电子信息学院光电系,四川成都610064 |
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| 摘 要： | 由于CCD采集的变形条纹图是空域有限的,在对其作窗口傅立叶变换处理时,高斯窗在图像边缘的不完整会产生测量误差。针对这种情况,提出了采用Gerchberg迭代法对条纹进行外插延拓,扩展窗口傅立叶变换处理的有效区域范围,进而改善窗口傅立叶变换的测量精度。
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| 关 键 词： | 窗口傅里叶变换 三维面形测量 Gerchberg外插迭代 |
Improved windowed Fourier transform method |
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| FU Yan-hua,CHEN Wen-jing.Improved windowed Fourier transform method[J].Laser Journal,2010(4):33-34. |
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| Authors: | FU Yan-hua CHEN Wen-jing |
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| Affiliation: | 1.Department of Mathematics and Physics,Hubei Automotive Industries Institute,Shiyan 442002,China;2.Department of Opto-Electronics,Sichuan University,Chengdu 610064,China) |
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| Abstract: | Because the deformed fringe pattern captured by CCD is limited extension in space,while gauss window scanning the edge of the deformed fringe pattern during WFT processing,the gauss window is not a whole gauss window shape, which will produce measurement error.So we extend the fringe pattern by Gerchberg iteration to improve the measurement precision. |
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| Keywords: | windowed Fourier transform 3-D shape measurement Gerchberg iteration |
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