A method of plethysmography wave de-noising based on wavelet transform and spline interpolation
10.3969/J.ISSN.1672-8270.2015.10.008
- VernacularTitle:基于小波变换和样条插值的容积脉搏波去噪方法研究
- Author:
Yuhua ZHA
;
Wei LI
;
Wenxia CHEN
- Publication Type:Journal Article
- Keywords:
Plethysmography wave;
Wavelet transform;
Modified threshold;
Spline differential fitting
- From:
China Medical Equipment
2015;(10):27-29
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To eliminate the noise of the plethysmography wave and obtain plethysmography wave signal without noise. Methods:Using sym4 and combining the improved wavelet threshold wavelet algorithm to remove high frequency white noise of plethysmography wave, and then using spline differential fitting method to remove baseline drift of pulse wave volume. Results:The experimental results show that the high frequency noise and baseline drift of plethysmography wave have been removed effectively processed by the sym4 wavelet and combining with improved threshold of wavelet algorithm and spline difference after fitting. Conclusion:The method can well remove the noise of the plethysmography wave and retains the effective information of plethysmography wave effectively.
