how to view image from MAT file

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Ashbub 2017-1-22

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https://ww2.mathworks.cn/matlabcentral/answers/321429-how-to-view-image-from-mat-file

评论： blues 2018-10-25

Hi, I am new in Matlab. I have saved a 3D CT image data in MAT format and loaded it on Matlab. It shows [1x61x54 uint16] and 'struct' as data type. I need to do segmentation on the image. How can I view the image so that I can work on it? I don't have much idea about data structure. I badly need the solution. Thankyou.

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Walter Roberson 2017-1-22

That size could be one single plane of an image but it cannot be an entire 3d image.

Can you attach the mat file?

Ashbub 2017-1-22

编辑：Ashbub 2017-1-22

trial.mat

Thankyou for your reply. Yes, you are right. I cropped the image in a way so that I can have only one slice to work on it. Here is the file.

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采纳的回答

Image Analyst 2017-1-22

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/321429-how-to-view-image-from-mat-file#answer_251499

在 MATLAB Online 中打开

Try this:

filename = 'trial.mat';
s = load(filename)
% Extract array from structure.
m = s.Avizo_trial_mat;
% Get rid of 1 dimension.
m = squeeze(m); 
whos m
% Display the slice:
imshow(m, [], 'InitialMagnification', 500);
axis on;

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Walter Roberson 2018-10-23

So you would combine them as if they were rgb?

Note that 256 is a power of 2 and is not divisible by 3.

blues 2018-10-25

Not sure! I want to combine each three slices (say) to make a single slice of thickness 3 mm, so that I can print it.

The matrix I have is 256x256x256 (voxel size 1mm^3) array and would like to transform original matrix into 256x256x84 ( 256/3 approx. 84). The new matrix will have same dimension in x and y but slice thickness will be 3mm.

Based of the code posted above, I can easily see image slices. But I am thinking about to print the image slice with white matter (say, high intensity: 1.0) as 2 mm, gray matter (medium intensity: 0.5) as 1 mm, and background (low intensity part = 0) as 3 mm in a single slice. What is the way to do this? Plan is to make a meaningful stack of image slices to that I could 3d print them.

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