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- W2364683144 abstract "With Fresnel off-axis digital holography system,digital hologram of grid was recorded and reconstructed numerically.And the phase unwrapping of the reconstructed phase image was done,first by discrete cosine transform(DCT) least square method,and then post-processing,namely,an integer multiple of 2π was added to or deducted the corresponding point of the original wrapped phase.This result was compared with that of phase unwrapping by DCT least square method,and until the smallest Absolute value difference was obtained.The phase value processed of the original wrapped phase was taken as the final result of phase unwrapping.Measurement and analysis were performed about 3D image from phase unwrapping image of the grid and atomic force microscope.The results show that the precision of phase unwrapping can be improved by post-processing." @default.
- W2364683144 created "2016-06-24" @default.
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- W2364683144 date "2008-01-01" @default.
- W2364683144 modified "2023-09-22" @default.
- W2364683144 title "Implement of phase unwrapping of digital holographic reconstruction image by discrete cosine transform least square method" @default.
- W2364683144 hasPublicationYear "2008" @default.
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