Direct analysis of in-line particle holograms by using wavelet transform and envelope reconstruction method |
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Authors: | Siriwat Soontaranon Joewono Widjaja Toshimitsu Asakura |
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Institution: | a Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand b Faculty of Engineering, Hokkai-Gakuen University, Sapporo, Hokkaido 064-0926, Japan |
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Abstract: | We propose a new digital method for sizing particles and tracking their positions from an in-line hologram by using a combination of a wavelet transform and a reconstruction of the envelope functions. In the proposed method, the hologram is recorded by a charge-coupled device (CCD) sensor. The wavelet transform of digitized holograms gives information about the position of particles, while the reconstruction of envelope functions provides the size of particles. Preliminary theoretical and experimental verifications are presented. The system limitation of the method is discussed. |
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Keywords: | Particle holography in-line holography wavelet transform digital analysis |
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