Error with part of code for MRI enhancement.
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Westin Messer
on 9 Mar 2018
Commented: Walter Roberson
on 9 Mar 2018
Hello,
I have code for an MRI enhancement that I know has been verified and works. However when I try and run it I get an error at 'im plc 3 4'. Does anyone know why Matlab doesn't recognize that and what its doing? Thank you!
% fig_brain_fft2
x = imread('Brainweb.jpg')';
f = fftshift(fft2(x));
im plc 3 4
im(1, x)
axis off, title ''
%colormap(gca, hot)
tmp = abs(f); tmp = tmp / max(tmp(:));
im(2, log(0.0001 + tmp))
axis off, title ''
cmap = colormap(jet);
cmap(1,:) = 0;
colormap(cmap)
im subplot 3
plot(200*tmp(:,end/2+[-10 1 10]), 'r')
axis([0 256 0 200])
xtick([1 256])
ytick([0 200])
axis off
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Accepted Answer
Image Analyst
on 9 Mar 2018
You forgot to include the im() function. Maybe try calling it like you do the second time, with parentheses.
% Call im()
im(plc, 3, 4); % I have no idea what this function does.
Make sure plc is defined in advance. I also have no idea how this could possibly work:
im subplot 3
subplot() is a function, and you're trying to pass it to your im() function - is that right??? Explain what is going on there.
More Answers (1)
Walter Roberson
on 9 Mar 2018
That code is part of a package available at http://web.eecs.umich.edu/~fessler/irt/fessler.tgz . If you download and expand that, and look in the graph subdirectory, then you will find im.m . So you should be loading the entire package and using pathtool to add the directory with all of its subdirectories.
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