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Settings of UIV algorithm
| No. of iterations | 3 | Window size | 32 pixels |
|---|---|---|---|
| No. of frames ensemble averaged | 11 | Window overlap | 50% |
| Window deformation | Spline | No. of POD modes | 10 |
| Universal outlier detection | 1.5 | Relative SG filter length | 0.4 |
| Subpixel estimator | Gaussian | Lumen mask | LSS + DPF |
| Lateral resolution | 75 µm | Axial resolution | 52 µm |
POD = proper orthogonal decomposition; SG = Savitzky–Golay; LSS = Level Set Segmentation; DPF = directional peak fitting.
