由网友(养虎人)分享简介：图形和音频编辑和处理软件通常包含的功能被称为高通滤波器和低通滤波器。究竟是什么做这些做的，什么是算法实现它们？Graphics and audio editing and processing software often contain functions called "High-Pass Filter" and...

图形和音频编辑和处理软件通常包含的功能被称为高通滤波器和低通滤波器。究竟是什么做这些做的，什么是算法实现它们？

Graphics and audio editing and processing software often contain functions called "High-Pass Filter" and "Low-Pass Filter". Exactly what do these do, and what are the algorithms for implementing them?

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百科：

高通滤波器 低通滤波器 带通滤波器 High-pass filter Low-pass filter Band-pass filter

这些高，低，以及带术语指的频率的。在高通，试图删除低频。在低通，您尝试删除高。在带通，你只允许一个连续的频率范围内保持不变。

These "high", "low", and "band" terms refer to frequencies. In high-pass, you try to remove low frequencies. In low-pass, you try to remove high. In band pass, you only allow a continuous frequency range to remain.

选择截止频率取决于你的应用程序。编码这些过滤器既可以通过模拟RC电路或用傅立叶玩弄进行转换的时间为基础的数据。请参阅Wikipedia文章为code的例子。

Choosing the cut-off frequency depends upon your application. Coding these filters can either be done by simulating RC circuits or by playing around with Fourier transforms of your time-based data. See the wikipedia articles for code examples.