Abstract
Presented is a memory-efficient and highly parallelizable method for reconstructing volumes, based on a homography fit synthetic aperture refocusing method. This technique facilitates rapid processing of very large amounts of data, such as that recorded using high-speed cameras, for the purpose of conducting 3D particle imaging velocimetry and particle tracking velocimetry.
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Notes
The z depth we wish to calculate the refocused image at is the z depth in the calibrated world coordinate system. Note that conversion of \(P_j^z\) from world units to pixel units (such that the extent of \(P_j^z\) in pixel units is the size, in pixels, of the refocused image being calculated) and vice versa will be required as needed.
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Acknowledgements
Funding for this study was provided by the University of Michigan Naval Engineering Education Center.
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Bajpayee, A., Techet, A.H. Fast volume reconstruction for 3D PIV. Exp Fluids 58, 95 (2017). https://doi.org/10.1007/s00348-017-2373-3
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DOI: https://doi.org/10.1007/s00348-017-2373-3