Adult Facial HRV Trend Monitoring (rPPG) | 成人心率变异性（HRV）趋势监测（面部）

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Using everyday cameras (laptop camera, smartphone front camera, smart mirror), the system records 30-60 seconds of facial video and uses remote photoplethysmography (rPPG) to extract subtle color variations from facial skin micro-circulation, from which it computes heart-rate-variability (HRV) metrics including SDNN (standard deviation of all normal sinus RR intervals) and RMSSD (root mean square of successive RR-interval. | 通过日常摄像头（如电脑摄像头、手机前置摄像头）拍摄面部视频（30-60秒），利用光电容积描记技术（远程光电容积描记术，rPPG）提取面部皮肤微循环的微弱色度变化，从中计算心率变异性（HRV）指标，包括SDNN（全部正常窦性心搏间期的标准差）、RMSSD（相邻心搏间期差值的均方根）等。该技能可用于压力评估、心血管健康监测及疲劳管理。