• 中国计算机学会会刊
  • 中国科技核心期刊
  • 中文核心期刊

J4 ›› 2012, Vol. 34 ›› Issue (9): 88-92.

• 论文 • 上一篇    下一篇

脉象信号滤波与特征值提取

蔡潇1,秦肖臻1,康双双2   

  1. (1.华中科技大学控制科学与工程系,湖北 武汉 430074;
    2.中国地质大学(武汉)信息工程学院,湖北 武汉 430074)
  • 收稿日期:2011-08-27 修回日期:2011-11-21 出版日期:2012-09-25 发布日期:2012-09-25

Pulse Signal Denoising and Feature Point Extraction

CAI Xiao1,QIN Xiaozhen1,KANG Shuangshuang2   

  1. (1.Department of Control Science and Engineering,
    Huazhong University of Science and  Technology,Wuhan 430074;
    2.School of Information Engineering,China University of Geosciences,Wuhan 430074,China)
  • Received:2011-08-27 Revised:2011-11-21 Online:2012-09-25 Published:2012-09-25

摘要:

脉象作为人体一项基本的生理特征,反映了个体整体性的生理情况,尤其是个体血管与心脏的健康状况。由于脉象诊断自古以来就存在不够定量客观的现实问题,为了客观定量地对脉象这种微弱信号加以分析,本文利用小波变换在时域与频域多级分辨率的特性,对脉象信息进行多小波分离出高频噪声信号以及基线漂移,在此基础上对信号去噪滤波。利用小波变换奇异点突变,提取脉象周期信息作为一类特征值。通过三次样条拟合出单周期脉象波形,提取出脉象搏动微分、积分曲线以及极值点的信息,阐述了它们与脉形特征对应关系,并作为脉形特征值。通过样条建模计算出的特征值为进一步的脉象识别提供了数据信息。

关键词: 脉象信号, 小波变换, 三次样条拟合, 脉象特征值

Abstract:

By utilizing the wavelet transform which has an ability to reveal lowfrequency signal and highfrequency signal, the powerfrequency and baseline wander interference in pulse signal is eliminated.The signal period is detected with the reconstructed detail signal.Every pulse period can be drawn up with spline fitting.The feature points of the denoised signal are detected with the first derivative of the spline fitting function and the integral function.At last we find out the relationship between the feature of the pulse and the physiological significance.

Key words: pulse signal;wavelet transform;spline fitting;feature points of pulse signal