§4.9.2巴特沃斯高通滤波器BHPF Illustration of butterworth highpass filters H() H(u.v) 1.0 低通 lowpass -D(u. Do Hnp(u,v)1Hip(u,v) H(,) H(0) 高通 highpass +D(4)Illustration of butterworth highpass filters 高通 highpass 低通 lowpass §4.9.2 巴特沃斯高通滤波器BHPF 𝐻ℎ𝑝(𝑢, 𝑣) = 1 − 𝐻𝑙𝑝(𝑢, 𝑣൯