巴特沃斯二阶滤波器，高通滤波器，可以有效地对信号进行处理,Second-order Butterworth filter, high-pass filter is an effective way to process the signals

数字图像频域滤波处理，分别进行二阶巴特沃斯(Butterworth)高通、低通滤波器。-Digital image processing frequency domain filtering, respectively second-order Butterworth (Butterworth) high pass, low pass filter.