SpeedCam

Car speed from a phone camera, in the browser.

• JavaScript
• TensorFlow.js
• Computer vision
• Device sensors

What it does

Detects cars with COCO-SSD, tracks them across frames and turns their motion into km/h, saving each reading with a photo. Speed comes from a tap calibration, the phone's orientation sensors, or typical vehicle sizes.

Highlights

• One HTML file; video never leaves the device.
• Road name and speed limit from OpenStreetMap.
• Field of view self-tunes from passing cars.