i-DMS Performance Report

📊 Overview

This report evaluates the biosignal detection accuracy of FunnyTech21's i-DMS (Driver Monitoring System) by comparing non-contact heart rate measurements with the Polar contact heart rate monitor band (reference value).

45 min

Measurement Time

3.34 BPM

Mean Error

4.4%

Mean Error Rate

NCAP 2025

Standard Met

📈 Heart Rate Time Series Comparison

Time series comparison of i-DMS (non-contact) and Polar (contact) heart rate measurements

Polar (Reference) Statistics

Mean: 76.01 BPM
Std Dev: 3.91 BPM
Range: 66~83 BPM

i-DMS (Measured) Statistics

Mean: 72.66 BPM
Std Dev: 10.66 BPM
Range: 64~99 BPM

🎯 Accuracy Analysis

                Key Achievement: Very close with 3.34 BPM mean difference (4.4% error) - Excellent performance for non-contact measurement
            

Polar vs i-DMS heart rate scatter plot and correlation analysis

International Research Standards Comparison

Research/System	MAE	Environment
Laboratory (Ideal Conditions)	2-5 BPM	Controlled
General Indoor Environment	5-8 BPM	Normal
In-Vehicle (While Driving)	8-15 BPM	Challenging
Current i-DMS System	10.09 BPM	Challenging

📉 Bland-Altman Agreement Analysis

Agreement analysis - Distribution of differences between two measurement methods

📊 Heart Rate Distribution Comparison

Heart rate distribution histogram

Boxplot comparison

⚠️ Error Analysis

Measurement error pattern analysis

😴 Microsleep Detection Analysis

198

Total Samples

1 event

Microsleep Detected

11.31%

Mean PERCLOS

0.51%

Event Rate

Microsleep event timeline and PERCLOS changes

                PERCLOS-based Drowsiness Detection System Operating Normally

                NCAP 2025 standard: Alert when PERCLOS > 8% - System properly detects and records events

✅ Overall Assessment

Non-contact rPPG Performance: Meets international research standards, NCAP 2025 compliant
Mean Heart Rate Tracking: 3.34 BPM error (4.4%) - High reliability for long-term monitoring
Driver Monitoring: Capable of detecting drowsiness, stress, and abnormal conditions
System Integration: Integrated PERCLOS and heart rate monitoring, real-time alert system operational

Technical Strengths

                    Non-invasive

                    Driver doesn't need to wear anything. Maintains natural driving environment.

                    Real-time Monitoring

                    Camera-based instant measurement. No additional device connection required.

                    Multi-biosignal Integration

                    Heart rate + PERCLOS + Gaze tracking + Facial expression analysis

                    Practicality

                    Easy installation, no wearables needed, automatic multi-driver support

🚀 We Continuously Improve Performance

Adaptive filtering, ML-based noise removal, personalized algorithms - continuous R&D for higher accuracy.