从颈部多帧图像序列获取脉搏波信号

Obtaining pulse wave signal from multi-frame image sequence of neck

脉搏波是表征人体生理状况的重要指标,基于成像式的非接触式脉搏波检测技术在医疗健康领域具有重要的研究意义。鉴于目前非接触式获取脉搏波的方法存在波形细节丢失的缺点,提出一种利用近红外光源照明,多帧连续照相颈动脉搏动来获取脉搏波信号的方法。实验中,在波长为850nm的光源照明环境下,由工业级近红外相机远距离拍摄颈动脉搏动引起的表皮振动。选取感兴趣区域后提取到原始脉搏波信号,进而利用极大重叠离散小波变化对信号进行滤波处理,最终得到保留细节特征的脉搏波。对不同受试者的测量结果显示,方法获得的波形可以观察到主波、潮波及重搏波等特征,对于非接触式获取脉搏波具有重要的参考价值。

Pulse wave is an important indicator of human physiological status.The non-contact pulse wave detection technology based on imaging has vital research significance in the field of medical and health.Because the current non-contact method of obtaining pulse wave is always lack of waveform details,a method of obtaining pulse wave signal using near-infrared light source and multi-frame continuous photography of carotid pulse was proposed.With experiment environment of an 850 nm light source,epidermal vibration caused by carotid artery pulsation was photographed using an industrial near-infrared camera.The original pulse wave signal was extracted after selecting the region of interest,then the signal was filtered by maximal overlapping discrete wavelet transform.Eventually,the preserving details pulse wave was obtained.The measurement results of different subjects showed that the obtained wave observes the characteristics of the main wave,tidal wave and heavy pulse wave.The proposed method plays an important role for non-contact acquisition of pulse wave.