Error with part of code for MRI enhancement.

Question

Westin Messer 2018-3-9

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/387388-error-with-part-of-code-for-mri-enhancement

评论： Walter Roberson 2018-3-9

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

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Image Analyst 2018-3-9

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/387388-error-with-part-of-code-for-mri-enhancement#answer_309300

在 MATLAB Online 中打开

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.

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Westin Messer 2018-3-9

I'm just as confused as you are. I'm really just trying to get the code to run.

请先登录，再进行评论。

Answer 2

Walter Roberson 2018-3-9

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/387388-error-with-part-of-code-for-mri-enhancement#answer_309306

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.