RGB Heart Rate Monitor

Offline

Click "Start Monitor" to begin

BPM

Red

Green

Blue

For Best Results

Stay still for 10-15 seconds while the algorithm calibrates
Ensure good, consistent lighting on your face
Position your forehead within the cyan detection box
Results are approximate — not for medical use

How It Works

This monitor uses photoplethysmography (PPG) — detecting subtle color changes in your skin caused by blood flow. Your webcam captures these micro-variations in the RGB channels of your face, which are then processed using signal processing techniques.

The signal is filtered with a Butterworth bandpass filter (0.83-3.0 Hz, corresponding to 50-180 BPM), then analyzed using Fast Fourier Transform (FFT) to find the dominant frequency, which corresponds to your heart rate.

JavaScript WebRTC FFT Signal Processing Computer Vision

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