Single-pixel resolution ensemble correlation for micro-PIV applications

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Multi-frame pyramid correlation for time-resolved PIV (2012, background): “As a result, the number of image pairs can be increased for long sequences and the interrogation size can be significantly reduced without lack of robustness, virtually down to a single pixel (Westerweel et al. 2004; Kähler et al. 2006).”
On the resolution limit of digital particle image velocimetry (2012, methodology): “For each pixel, the correlation function was computed using the approach outlined by Westerweel et al. (2004).”
Digital particle image velocimetry (DPIV) robust phase correlation (2009, methodology): “For example, techniques such as the ensemble correlation [7] and the single pixel correlation [8] were developed for micro-DPIV applications and have shown to offer greater accuracy when evaluating certain steady or periodic flows.”
On the uncertainty of digital PIV and PTV near walls (2012, methodology): “This evaluation technique was first applied by Westerweel et al. (2004) for stationary laminar flows in microfluidics.”
Recent Advances in Micro-Particle Image Velocimetry (2010, unknown): “To mitigate this problem, researchers proposed a novel algorithm denoted as single-pixel evaluation (SPE) (Westerweel et al. 2004) to drastically increase the spatial resolution without decreasing SNR.”