Bi Shubo, Wang Haipeng, Zhang Shuaishuai
School of Intelligent Manufacturing, Jiangsu College of Engineering and Technology, Nantong 226006, China.
Department of Precision Mechanical Engineering, Shanghai University, Shanghai 200444, China.
Sensors (Basel). 2024 May 23;24(11):3346. doi: 10.3390/s24113346.
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.
本文提出了一种基于光照和位移补偿的iPPG算法，用于在复杂检测条件下测量心率。设计了两种补偿子算法，包括光照补偿和位移补偿，并将其集成到iPPG算法中，以实现更准确的心率测量。在光照补偿子算法中，基于均值滤波器的光照调整策略补偿了环境光变化引起的测量偏差。在位移补偿子算法中，基于光流的位移计算策略补偿了受试者运动引起的测量偏差。进行了一系列心率测量实验，以验证所提方法的有效性。与传统的iPPG相比，在不同检测距离下平均测量精度提高了3.8%，在不同光照强度下提高了5.0%。
