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Table 1 Sharpness metric calculation time for a single image

From: Adaptive particle image velocimetry based on sharpness metrics

Metric Type Calculation time
S1 Squared Laplace image 3 ms
S2 Mendelsohn and Mayall 3 ms
S3 Riemann tensor 5 ms
S4 Steepness 8 ms
S5 Maximal gradients 13 ms