PIV Ground Truth

Synthetic Particle Field Generator

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QA Suite

PIV Ground Truth — Algorithm Validation
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PIV QA Suite

Algorithm Validation
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FRAME PAIR  ·  ■ A  ·  ■ B  ·  [C] exit

PIV Ground Truth

Flow Field
Particles
— ppp
Particle Shape
ρ=0 circular, ρ→±1 elongated (correlated 2D Gaussian). Align makes particles orient along local velocity — models motion blur.
Particle Variability
Image Noise
Timing
Captures Frame A (red), advances 1 camera frame, shows Frame B (green). Overlap = yellow. Measures actual Δpx.
Scale Calibration
1.2443
1.2503
0.8036 / 0.7998
Particle Seed
Enter seed to reproduce a particle layout. Hit ↻ New for a random one, then reseed with [R].
Obstacle
Validation
Run standardized algorithm validation tests against known ground truth.
Ref Speed
—
px / s
Direction
—
degrees
Δpx / TV frame
—
@ 60 Hz
Δpx / cam frame
—
@ 30 fps
True Speed
—
m / s
PIV Measured ✎
m / s
Error
—
m / s
% Error
—
V min
—
m / s
V center
—
m / s
V max
—
m / s
Profile type
—
[H] panel  ·  [P] pause  ·  [F] fullscreen  ·  [R] re-seed  ·  [C] frame pair  ·  [V] color by speed  ·  [?] keys
Keyboard Shortcuts
HToggle control panel
PPause / resume simulation
FToggle fullscreen
RRe-seed particles (new random layout)
CCapture frame pair A→B / exit pair mode
VToggle color-by-speed mode
EscExit frame pair / remove obstacle
?Show / hide this reference
True velocity at cursor
Vx —   Vy —   px/s
|V| — m/s   θ —°
Δpx/frame —
0
1 m/s
 speed