一种基于最优区间函数拟合的P波识别方法

On Recognizing the ECG P-wave Based on Approximating Functions in the Optimum Region

针对不同心电图中P波位置、形状差异较大且易受干扰影响而难以准确识别的问题,我们提出了一种基于最优区间函数拟合的P波识别方法,该方法首先在局部范围内变化函数拟合区间,然后在每个区间内用二次函数对P波按最小二乘法原理逼近,通过对比拟合误差,找出P波的最优拟合区间,最后利用在最优拟合区间上的拟合求出P波的各特征点。经MIT-BIH心电数据库的心电数据验证,该方法是准确有效的。

Aiming at the problem that it is difficult to accurately recognize the position and the figure of P wave in the ECGs easily influenced by the diversified interference,a P wave detection algorithm based on approximating functions in the optimum region is proposed in this paper. In the algorithm we use a conic to approach the P wave by means of the least square method in every region,which is shifted in local range.Then we find the optimum approach region of P wave by comparing the approximating error. Finall...