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Snapshot Space–Time Holographic 3D Particle Tracking Velocimetry
Author(s) -
Chen Ni,
Wang Congli,
Heidrich Wolfgang
Publication year - 2021
Publication title -
laser and photonics reviews
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.778
H-Index - 116
eISSN - 1863-8899
pISSN - 1863-8880
DOI - 10.1002/lpor.202100008
Subject(s) - particle tracking velocimetry , velocimetry , holography , digital holography , tracking (education) , computation , particle image velocimetry , computer science , particle (ecology) , optics , computer vision , physics , algorithm , mechanics , geology , psychology , pedagogy , oceanography , turbulence
Digital inline holography is an amazingly simple and effective approach for 3D imaging, to which particle tracking velocimetry is of particular interest. Conventional digital holographic particle tracking velocimetry techniques are computationally separated in particle and flow reconstruction, plus the expensive computations. Usually, the particle volumes are recovered first, from which fluid flows are computed. Without iterative reconstructions, This sequential space–time process lacks accuracy. This paper presents a joint optimization framework for digital holographic particle tracking velocimetry: particle volumes and fluid flows are reconstructed jointly in a higher space–time dimension, enabling faster convergence and better reconstruction quality of both fluid flow and particle volumes within a few minutes on modern GPUs. Synthetic and experimental results are presented to show the efficiency of the proposed technique.