Definition & Importance:
Eye-tracking latency and accuracy are critical for dynamic autostereoscopic displays (e.g., gaze-contingent rendering). Poor performance causes motion blur, misaligned 3D viewpoints, or viewer discomfort.
Key Metrics:
- Latency –
- Time delay between eye movement and display adjustment (e.g., viewpoint shift).
- Target: <10 ms (to match human perceptual thresholds).
- Measurement: High-speed cameras synchronized with display updates.
- Accuracy –
- Angular deviation between tracked and actual gaze direction.
- Target: <0.5° error for seamless 3D.
- Measurement: Calibrated fiducial markers (ground-truth comparison).
Challenges:
- System lag (sensor processing, rendering pipeline).
- Environmental noise (glasses, lighting, head motion).
Optimization:
- Predictive algorithms (Kalman filters, neural networks).
- Hardware acceleration (dedicated eye-tracking ASICs).
