基于子波变换的心阻抗血流图的特征提取

Extracting character of ICG signal by wavelet analysis

本文介绍了一种利用子波变换对心阻抗血流图的特征点进行检测的方法 ,即主要是通过把信号在多个尺度上分解 ,在感兴趣的尺度上找到模极值点和特征点的对应关系 ,从而完成对特征点的自动检测 ,同时本文对子波时 /频窗的自适应性作了直观的说明 ,并对子波变换的滤波器组解释和算法实现给予讨论。经过临床实验表明 ,该方法准确性高 ,有一定实用价值。

In this paper ,a new design using the latest technique in signal processing ,the wavelet analysis method , was developed to process impedance cardiography signal(ICG),we can get the position of the points which we have interest with in the cardiography signal by analyzing the ICG in different scale.In the same time, there were directly explanations about wavelet in this pater .