Create a .mat file similar to MRI

2013 5 5
2 个回答
更新时间：2014 12 2
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Hello,
Does anyone know how to place 12 mri images into the same matrix size and shape as D in the .mat file MRI?
Any help is greatly appreciated.
-Thanks

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回答（2 个）

Youssef Khmou
Youssef Khmou 2013-5-6
编辑：Youssef Khmou 2013-5-6

0 个投票

hi,
The default MRI sample has singleton dimension right?
try :
% given I1,.............,I12
[m n]=size(I1);
M=zeros(m,n,12);
M(:,:,1)=I1;
%....
M(:,:,12)=I12;
D=zeros(m,n,1,12);
for n=1:12
D(:,:,:,n)=M(:,:,n);
end
save Neoplasm_MRI D

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Christopher P.
Christopher P. 2013-5-6
This is how I load the images into the workspace I1=imread('Slice_1.jpg'); I2=imread('Slice_2.jpg'); I3=imread('Slice_3.jpg'); I4=imread('Slice_4.jpg'); I5=imread('Slice_5.jpg'); I6=imread('Slice_6.jpg'); I7=imread('Slice_7.jpg'); I8=imread('Slice_8.jpg'); I9=imread('Slice_9.jpg'); I10=imread('Slice_10.jpg'); I11=imread('Slice_11.jpg'); I12=imread('Slice_12.jpg'); imshow(I12)
Here's the code for placing the images in the matrix
i keep getting this error
??? Assignment has more non-singleton rhs dimensions than non-singleton subscripts
Error in ==> imread_tomatrix at 56 D(m,n,1,1)=I1;
[m n]=size(I1); p=12; D=zeros(m,n,1,p); D(m,n,1,1)=I1; D(m,n,1,2)=I2; D(m,n,1,3)=I3; D(m,n,1,4)=I4; D(m,n,1,5)=I5; D(m,n,1,6)=I6; D(m,n,1,7)=I7; D(m,n,1,8)=I8; D(m,n,1,9)=I9; D(m,n,1,10)=I10; D(m,n,1,11)=I11; D(m,n,1,12)=I12; save Neoplasm_MRI D
Youssef Khmou
Youssef Khmou 2013-5-6
try the edited code...
Christopher P.
Christopher P. 2013-5-6
I tried the code, it allowed me to upload images into the D matrix only after i made them binary. I modified the code to add an extra dimension to M to see if that was the issue. i received this error in both instances
??? Subscripted assignment dimension mismatch.
Error in ==> imread_tomatrix at 58 M(:,:,:,1)=I1;
Youssef Khmou
Youssef Khmou 2013-5-6
hi Christopher,
No 'M' was only a bypass, now D contains the 12 slices and has same m-n-1-12 as dimensions, it can also contains double valued images , what is the problem
Youssef Khmou
Youssef Khmou 2013-5-6
here is simple example : ( use : operator instead of 1 ok? )
I1=rand(10); % my first image {double}
I2=rand(10); % my second image {double}
M=zeros(10,10,1,2); % container
M(:,:,:,1)=I1; % transfer 1
M(:,:,:,2)=I1; % transfer 2
This should work in your case too
Christopher P.
Christopher P. 2013-5-6
I initially tried using M that way.
Here's a second try with your code
I got the same error ??? Subscripted assignment dimension mismatch.
Error in ==> imread_tomatrix at 55 M(:,:,1)=I1;
% given I1,.............,I12 [m n]=size(I1); M=zeros(m,n,12); M(:,:,1)=I1; M(:,:,2)=I2; M(:,:,3)=I3; M(:,:,4)=I4; M(:,:,5)=I5; M(:,:,6)=I6; M(:,:,7)=I7; M(:,:,8)=I8; M(:,:,9)=I9; M(:,:,10)=I10; M(:,:,11)=I11; M(:,:,12)=I12; D=zeros(m,n,1,12); for n=1:12 D(:,:,:,n)=M(:,:,:,n); end save Neoplasm_MRI D
Youssef Khmou
Youssef Khmou 2013-5-6
编辑：Youssef Khmou 2013-5-6
the images are RGB , or grayscale ?because that error is not in what we are discussing now its in the size of image(s) : try
size(I1)
Christopher P.
Christopher P. 2013-5-6
size(I1)
ans =
225 210 3
so the 3rd dimension is for rgb right?
Youssef Khmou
Youssef Khmou 2013-5-6
well thats where the problem then, you have to solutions : 1) transform them into grayscale images using
rgb2gray
2)or add a 4th/5th dimention in M/D:
M=zeros(m,n,3,1,12) ;
% in the code use M(:,:,:,:,n)
Christopher P.
Christopher P. 2013-5-6
Got it working.
Thank you so much for you help.
It's greatly appreciated.

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bintoro adi
bintoro adi 2014-12-2

0 个投票

Hi Christoper, Can u write the final code, because i still have the the same error (Subscripted assignment dimension mismatch). thank u...

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