内含心电信号数据及运用MATLAB写的源代码，是信号处理的基础，计算十字叉丝的在不同距离的衍射图像。- ECG data and includes source code written in MATLAB, Is the basis of the signal processing, Calculation crosshairs diffraction image at different distances.

NLM denoising, popular in image processing, is here used for denoising time series data (ECG)