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- W2093568002 abstract "Time-frequency analysis is widely applied to the optical measurement for phase retrieval from fringe patterns.Windowed Fourier transform (WFT) is one of the time-frequency analysis methods and has recently received extensivestudy on phase retrieval from fringe patterns generated by the optical interferometry or structured light illumination.WFT has been applied for shape and deformation measurement in dynamic nondestructive testing. However, thecomputation time of WFT is longer than that of conventional Fourier transform method for fringe demodulation. Thishas restricted the WFT in the application for dynamic measurement. Therefore, a modified WFT is introduced to reducethe computation time. In this approach, the fast Fourier transform is implemented in the WFT algorithm to improve thecomputational efficiency and border effect of the proposed method for fringe analysis is discussed. The phase retrieval ofthe proposed method is simulated and the simulation results are compared with conventional Fourier transform methodand convolution method of WFT in terms of noise reduction. The experimental work on shape and deformationmeasurement is conducted to verify the effectiveness and validity of the proposed method." @default.
- W2093568002 created "2016-06-24" @default.
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- W2093568002 date "2009-12-04" @default.
- W2093568002 modified "2023-10-11" @default.
- W2093568002 title "A modified WFT for shape and deformation measurement" @default.
- W2093568002 doi "https://doi.org/10.1117/12.850868" @default.
- W2093568002 hasPublicationYear "2009" @default.
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