中文摘要：

光电容积脉搏波描记法（PPG）原理指出,特定波长的光强度在血液容积作用下呈现周期性变化,因此人面部的肤色会随着脉搏的波动发生微小的变化。根据该原理,可以实现低成本、无接触、无电极的舒适的心率测量,对于远程医疗监控等领域有很大的意义。使用普通摄像头采集人脸视频,通过主成分分析（PCA）对人脸的3个区域的绿色分量的均值提取主成分信号,消除部分外界噪声的干扰;提取的主成分信号经平滑处理后,进行去趋势化处理,然后经过所提出的波峰检测方法,提取其波峰,减少波峰的漏检或多检;此外,采用重叠直方图统计的方法,计算心率信号的波峰间隔。在实验中,采用康泰CMS-50D指夹式脉搏血氧仪（测量样本数174个）和美国BIOPAC公司MP150多导生理记录仪记录的ECG（样本数110个）,分别与所提取结果通过Bland-Altman分析方法进行对比。该方法与指夹式脉搏血氧仪测量结果的对比实验表明：叠加直方图统计方法的引入,使一致性评估评估的标准差由12.4次/min减小到8.0次/min左右,提高约1/3;与ECG的一致性评估的结果均值为1.8次/min,标准差为3.2次/min,两者均较小,说明两者结果具有很好的一致性。

英文摘要：

The technique photo plethysmo graphy（ PPG） shows that the light intensity has a periodical change with the change of blood volume. So the facial skin color will change a little along with the pulse. The technique can be used to measuring heart rate with many advantages,such as low cost,no contact and no electrode. This is helpful to remote medical monitoring and other fields. In this paper ordinary camera was used to collect human face videos. The principle components was extracted by calculating average values of green components on the three face regions through principal component analysis（ PCA）,and the noise was eliminated. The smoothing methods was used after PCA,and the detrending method was utilized in this paper.The peaks of signal were detected by the peak detecting method that was proposed in this work,which reduced detection of wrong peaks. Then the method of overlapping histogram statistics was used to get heart rate through calculating the intervals between peaks of the pulse signal. The proposed method was compared with results obtained from CMS- 50 D Finger clip type pulse oximeter of CONTEC company（ measurement samples was 170）and MP150 multi-channel physiological recorder of BIOPAC company（ measurement samples was 110） with the statistics method of Bland-Altma. Comparison of the results from CMS- 50 D with that from the proposed methods showed that the overlapping histogram statistics method reduced the standard deviations of the conformance assessment form 12. 4 beats / min to 8 beats / min. Comparison of the results from MP150 with thatfrom the proposed methods showed that the mean and the standard deviations of the conformance assessment was1. 81 and 3. 18 bpm respectively,indicating the results were in good consistency.