s4rout4.m

来自「Industrial Mathematics」· M 代码 · 共 10 行

% Routine 4.4  undo encryption 
Yhat = fft2(Y); 
Bhat = fft2(B); 
Xhat = Yhat./Bhat;
X1 = ifft2(Xhat); 
X1 = real(X1);
image(X1)
axis off
colormap grey