Figure 1
Velocity magnitude estimated at a instant using (b) wOFV⋆ and (c) cross-correlation, compared to the (a) ground truth from DNS.
Figure 2
Normalized RMSE of the (a) velocity field and (b) vorticity field obtained using cross-correlation compared to the presented software (wOFV⋆).
Figure 3
Normalized RMSE of the velocity fields obtained using different open-source software compared with the software presented (wOFV⋆).
Figure 4
Schematic of the core code workflow.
Figure 5
Schematic explanation of image patching.
Figure 6
Magnitude of the velocity estimates obtained using the same particle image data processed at a patch size of 642, 1282, and 2562 pixels.
Figure 7
Schematic explanation of image pyramiding scheme
Figure 8
Magnitude of the velocity estimates obtained using the same particle image data processed at a final pyramid level of j = 1 and j = 2, compared to the DNS ground truth.
Figure 9
The effect of different values of η on the estimated velocity field.
Figure 10
An illustration of the image warping operation.
Figure 11
Magnitude of the velocity field computed from the same PIV data processed at the same settings, with (c) and without (b) a Gaussian filter applied to the particle images at each pyramid level, compared to the ground truth (a).
Figure 12
An depiction of computing and to estimate η.
Pseudo-code 1
RunMain
Pseudo-code 2
BayesPyd_Sub
Pseudo-code 3
BayesPyd_Sub