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Biomedical Signal and Image Processing
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FIGURE 2.12 Image g(x, y). (Courtesy of Andre D’Avila, MD, Heart Institute (InCor),
University of Sao Paulo, Medical School, Sao Paulo, Brazil.)
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FIGURE 2.13 Magnitude of 2-D DFT of image g(x, y).
be used to display the image. Unlike “image”, the command “imshow” presents
the image without numbering the coordinates.
colormap(gray(256) );

image(g):

y = fft2(g);

xlabel(‘x’);ylabel(‘y’);

figure;

y_magnitude = abs(y);