频域高通滤波增强示例,采用傅里叶变换,进行理想高通滤波,理想高通加强滤波,巴特沃斯高通滤波和巴特沃斯高通加强滤波.-High-pass filter to enhance the frequency domain examples, using Fourier transform, the ideal high-pass filter, the ideal high-pass filter to strengthen Butterworth Butterworth high-pass filte