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Light and Displacement Compensation-Based iPPG for Heart-Rate Measurement in Complex Detection Conditions
Shubo Bi1,2, Haipeng Wang1, Shuaishuai Zhang2
1School of Intelligent Manufacturing, Jiangsu College of Engineering and Technology, Nantong 226006, China.
Abstract:
A light and displacement-compensation-based iPPG algorithm is proposed in this paper for heart-rate measurement in complex detection conditions. Two compensation sub-algorithms, including light compensation and displacement compensation, are designed and integrated into the iPPG algorithm for more accurate heart-rate measurement. In the light-compensation sub-algorithm, the measurement deviation caused by the ambient light change is compensated by the mean filter-based light adjustment strategy. In the displacement-compensation sub-algorithm, the measurement deviation caused by the subject motion is compensated by the optical flow-based displacement calculation strategy. A series of heart-rate measurement experiments are conducted to verify the effectiveness of the proposed method. Compared with conventional iPPG, the average measurement accuracy increases by 3.8% under different detection distances and 5.0% under different light intensities.
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