# 脑电分析之基线校正

**基线校准：**

在做完分段后，基本上就会做一个基线校正，就本身来说，它是线性变换的过程，在任何时候都可以做，为什么要做基线校正？

**它的好处：**

1、可以防止分段后漂移过高的Drift，造成某些幅度的漂移，校正后可以将所有通道拉回到一个尺度下显示。

2、消除脑电信号中的一些噪声的影响。

**怎么做的？**

一般是以event为0点，在0点之前的时间段算做刺激未发生前的时刻算得平均值，然后在0点后的每个采样点的数据减去这个平均值。当然，这是通常的做法，还有其它的做法，更多的基线做法

#### **谢谢大家观看，如有帮助，来个喜欢或者关注吧！** <a href="#xie-xie-da-jia-guan-kan-ru-you-bang-zhu-lai-ge-xi-huan-huo-zhe-guan-zhu-ba" id="xie-xie-da-jia-guan-kan-ru-you-bang-zhu-lai-ge-xi-huan-huo-zhe-guan-zhu-ba"></a>

本文作者：Chen Rui

星球地址 ：[知识星球](https://t.zsxq.com/W5M3F)[Blog ](https://t.zsxq.com/W5M3F)

知乎地址 : [知乎专栏](https://www.zhihu.com/people/braintechnology)&#x20;

B站地址 : [B站主页](<https://space.bilibili.com/328549846 >)&#x20;

公众号：大脑技术\
&#x20;CSDN地址 : [csdn主页](https://blog.csdn.net/craig_cc)


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