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I = imread('TwoCircles.tif');
I = double(I)/255;    [m m1] = size(I);

% Degradation parameters
kernel_type = 'gaussian';        kernel_size = 7;               kernel_std =1.5;                noise_std = 0.05;


% Generate the observed image with blur and noise
h = fspecial(kernel_type, kernel_size, kernel_std); Htf = imfilter(I, h, 'circular', 'same', 'conv');   noise = normrnd(0, noise_std, size(I));         g = Htf + noise;

% Generate the observed image with blur and noise
h_full = zeros(m);           [mh nh] = size(h);
h_full(1:mh,1:nh) = h;        
h_full = circshift(h_full, -round([(nh-1)/2 (mh-1)/2]));    eigHT = conj(fft2(h_full));  
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