Abstract
We describe a technique that allows an arbitrary size of the interrogation window when using the traditional FFT algorithm in analysing PIV recordings by either cross- or auto-correlation methods. The length and width of the effective interrogation window are no longer required to be composed of a number of pixels making a power of 2 (16, 32, 64 etc). This gives a higher flexibility in selecting the appropriate window size.
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Received: 28 January 1997/Accepted: 11 August 1997
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Gui, L., Merzkirch, W. Generating arbitrarily sized interrogation windows for correlation-based analysis of particle image velocimetry recordings. Experiments in Fluids 24, 66–69 (1998). https://doi.org/10.1007/s003480050151
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DOI: https://doi.org/10.1007/s003480050151