The effect of a discrete window offset on the accuracy of cross-correlation analysis of digital PIV recordings

By Jerry Westerweel, Dana Dabiri, Morteza Gharib. 1997

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Citations in the corpus

Digital particle image velocimetry (DPIV) robust phase correlation (2009, methodology): “For a DWO, these low displacement erroneous vectors are very hard to detect and often appear as high RMS error.”
Spatial resolution of PIV for the measurement of turbulence (2007, unknown): “In the case of PIV, Westerweel et al. (1997) improved the spatial resolution by nearly a factor of 10, through the use of a window offset.”
Uncertainty on PIV mean and fluctuating velocity due to bias and random errors (2013, background): “The primary advance in PIV dynamic range is window shifting [15].”
PIV error correction (2000, methodology): “ Westerweel et al. (1997) went on to show that these bias errors could be significantly reduced by correlating with an interrogation window offset by the integer value of local particle pixel displacement.”
PIV flow measurements for heat transfer characterization in two-pass square channels with smooth and 90° ribbed walls (2002, unknown): “The use of the window offset also improves the spatial resolution by effectively reducing the interrogation window size [19].”
PIV optimization for the study of turbulent flow using spectral analysis (2004, unknown): “The results obtained will be compared with those of Guichard et al (1998) and Westerweel et al (1997).”
PIVlab – Towards User-friendly, Affordable and Accurate Digital Particle Image Velocimetry in MATLAB (2014, methodology): “This disadvantage can be offset by running several passes of the DFT on the same dataset [18]: The integer result of the first analysis pass is used to offset the inter-rogation area in the following passes.”
Role of the tip vortex in the force generation of low-aspect-ratio normal flat plates (2007, methodology): “The measurement noise was reduced using an interrogation window-shifting technique given in Westerweel, Dabiri & Gharib (1997) .”
Single-pixel resolution ensemble correlation for micro-PIV applications (2004, methodology): “In both analyses local window shifting ( Westerweel et al. 1997 ) was applied in order to optimize the peak detectability, and the search area for the correlation peak was limited to a 9·5pixel domain.”