Detection of the Pulse Waveform Characteristic Points by Wavelet Transform Using Multiscale Differential Operator

Qun Wang, Zhiwen Liu
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引用次数: 3

Abstract

The pulse waveform characteristic point detection is important for non-invasively detecting cardiovascular parameters. A novel designed algorithm based on wavelet transform (WT) is developed. For some pulse waveforms, characteristic points exactly correspond to the zero-crossing of a wavelet with one vanishing moment, while the others incompletely correspond to. And characteristic points also correspond to the local extrema of a wavelet with two vanishing moment. So an algorithm combining a wavelet with one vanishing moment and another one with two vanishing moment is used to improve the detection rate of characteristic points. The results show that automatic identification of characteristics points has a high rate of accuracy.
基于多尺度微分算子的小波变换脉冲波形特征点检测
脉搏波形特征点检测是无创检测心血管参数的重要手段。提出了一种基于小波变换的新算法。对于某些脉冲波形,特征点完全对应于具有一个消失矩的小波的过零,而其他特征点则不完全对应于。特征点也对应于具有两个消失矩的小波的局部极值。为了提高特征点的检出率,提出了一种单消失矩小波和双消失矩小波相结合的算法。结果表明,特征点的自动识别具有较高的准确率。
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