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Optical Flow — Free Online Tool | Pixlane
Compute and visualize dense optical flow between two consecutive frames. See motion vectors, heatmaps showing displacement magnitude, and adjustable overlays.
Visualize dense optical flow between two frames — see motion vectors and displacement heatmaps.
All processing runs locally in your browser. Your files never leave your device — no upload, no server, no signup required.
Frequently Asked Questions
What is optical flow?
Optical flow estimates the apparent motion of pixels between two consecutive images. It produces a dense vector field showing how each pixel has moved, which is fundamental in video analysis, motion tracking, and autonomous navigation.
What do the motion vectors represent?
Each motion vector shows the direction and magnitude of displacement for a pixel or region between the two frames. Longer arrows or brighter colors indicate larger movement.
What does the heatmap show?
The heatmap visualizes displacement magnitude — warmer colors (red, yellow) indicate areas with large motion, while cooler colors (blue, green) indicate little or no movement.
Is my data uploaded to a server?
No. All processing runs locally in your browser using WebAssembly. Your images never leave your device — no upload, no server, no signup required.