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34 lines
467 B
Matlab
34 lines
467 B
Matlab
input_image = imread('download.jfif');
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image = rgb2gray(input_image);
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[M, N] = size(image);
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FT_img = fft2(double(image));
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D0 = 5;
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u = 0:(M-1);
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idx = find(u>M/2);
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u(idx) = u(idx)-M;
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v = 0:(N-1);
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idy = find(v>N/2);
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v(idy) = v(idy)-N;
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[V, U] = meshgrid(v, u);
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D = sqrt(U.^2+V.^2);
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H = double(D > D0);
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G = H.*FT_img;
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output_image = real(ifft2(double(G)));
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subplot(2, 1, 1), imshow(image),
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subplot(2, 1, 2), imshow(output_image, [ ]);
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