Optimal subpixel interpolation in particle image velocimetry
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- Roesgen, T. Exp Fluids (2003) 35: 252. doi:10.1007/s00348-003-0627-8
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It is shown that among the different techniques for particle image velocimetry subpixel interpolation, only the "sinc"-kernel creates an optimal result in that it completely suppresses spurious spectral sidelobes. An efficient method is introduced for the computation of the subpixel-accurate correlation peak position without any systematic errors. A connection is made with the kernel-dependent observation of the peak-locking phenomenon.