Generating arbitrarily sized interrogation windows for correlation-based analysis of particle image velocimetry recordings

@article{Gui1998GeneratingAS,
  title={Generating arbitrarily sized interrogation windows for correlation-based analysis of particle image velocimetry recordings},
  author={Liu Cheng Gui and Wolfgang Merzkirch},
  journal={Experiments in Fluids},
  year={1998},
  volume={24},
  pages={66-69}
}
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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