Image reconstruction only by its phase or magnitude

Question

Mithra 2013-11-17

1
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/106458-image-reconstruction-only-by-its-phase-or-magnitude

回答： mugambi ndwiga 2017-4-20

在 MATLAB Online 中打开

I have an image, I separate its phase and magnitude using fft2 , then I try to reconstruct it

Only by magnitude
Only by phase

Here is my code:

image = rgb2gray(imread('pillsetc.png')); 
F = fft2(double(image));
F_Mag = abs(F);
F_Phase = exp(1i*angle(F));
% reconstructin
I_Mag = ifft2(log(F_Mag+1));
I_Phase = ifft2(F_Phase);
% Calculate limits for plotting
I_Mag_min = min(min(abs(I_Mag)));
I_Mag_max = max(max(abs(I_Mag)));
I_Phase_min = min(min(abs(I_Phase)));
I_Phase_max = max(max(abs(I_Phase)));
% Display reconstructed images
subplot(121),imshow(abs(I_Mag),[I_Mag_min I_Mag_max]), colormap gray 
title('reconstructed image only by Magnitude');
subplot(122),imshow(abs(I_Phase),[I_Phase_min I_Phase_max]), colormap gray 
title('reconstructed image only by Phase');

But I don't know what is the problem with reconstruction by magnitude that it only shows a totally black image!!! What's wrong with the code? How can I fix it?

Thanks in advance