Sample ROI 256 × 256 px, native pixels
Camera off. Start the camera, or run a synthetic demo.
Calibrate the pixel pitch with a stage micrometer (README, “Pixel pitch calibration”).
Structure function D(q, τ), 32 radial q-bins
Scaling τ½(q) ∝ q−μ: μ≈1 swimming, μ≈2 diffusion
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waiting for 192 frames (6.4 s) of history
Swimmer share α
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Mean speed v̄
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Schulz mean
Speed width σᵥ
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Drift V
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Diffusion D
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passive component
ΔBIC swim − Brown
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