When alerts actually fire
- It does not alert on a single bad frame.
- Sound is played only when BAD posture persists (default: 2s).
- Returning to normal posture resets the alert timer and cooldown.
How it works
Posture is evaluated from the relative changes of eye/shoulder/nose/ear landmarks.
Core decision rules before use
What each on-screen metric means
- Turtle Neck: forward-head drift compared with your baseline
- Slouching: reduced shoulder-to-nose relative height
- Text Neck: increased head-down angle from nose/ear offset
Detection flow (detailed)
1. Landmark extraction
MediaPipe Pose extracts key landmarks from your webcam frame continuously.
2. Relative comparison
The current posture is compared with your baseline to measure tilt and drift.
3. Alert decision
If posture risk stays high over time, the app triggers quiet feedback.