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Table 1 Effect of the type of lighting of the face on the pulse measurement

From: Blood pulsation measurement using cameras operating in visible light: limitations

Type of lighting Measurement error δ for the adopted level of significance Comments
Daylight ±2 [beats per minute] for p < 0.01 Best results
LED ±3 [beats per minute] for p < 0.3 Dependent on control systems (one-half power results in a greater measurement error)
Bulb with filament ±2 [beats per minute] for p < 0.02 Comparable with visible light
Fluorescent light bulb ±4 [beats per minute] for p < 0.1 A greater error for a higher heart rate