1 June 1985 Automated Reduction Of Instantaneous Flow Field Images
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An automated data reduction system for the analysis of interference fringe patterns obtained using the particle image velocimetry technique is described. This system is based on digital image processing techniques that have provided the flexibility and speed needed to obtain more complete automation of the data reduction process. As approached here, this process includes scanning/searching for data on the photographic record, recognition of fringe patterns of sufficient quality, and, finally, analysis of these fringes to determine a local measure of the velocity magnitude and direction. The fringe analysis as well as the fringe image recognition are based on full-frame autocorrelation techniques using parallel processing capabilities.
G. A. Reynolds, M. Short, M. C. Whiffen, "Automated Reduction Of Instantaneous Flow Field Images," Optical Engineering 24(3), 243475 (1 June 1985). https://doi.org/10.1117/12.7973510 . Submission:

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