《数字图像处理》——高频强调滤波

Matlab自写高通滤波器函数：function H=hpfilter(type,f,D0,n)[M,N]=size(f);n1=floor(M/2); n2=floor(N/2);for i=1:M for j=1:N D(i,j)=[(i-n1)^2+(j-n2)^2]^0.5; endendswitch type case 'ideal' H = double(D >= D0); case 'btw' if nargi...