MATLAB: I read 3D volume whose size 240x240x155 and I want to read slice by slice and wants to apply feature extraction techniques on them How to read one slice than other

image analysisimage processingMATLAB

Hello Please, may you help me to read the 3D volume in MATLAB?

    v=niftiread('Brats17_2013_2_1_flair.nii.gz');
    figure, imshow(v(:,:,85),[]);
    %how to read slice#1 than slice#2 and so on

Best Answer

for slicenumber = 1 : size(v,3)
  this_slice = v(:,:,slicenumber);
  this_result = YourFeatureExtractionCallGoesHere(this_slice);
  all_results{slicenumber} = this_result;
end

Sometimes other data structures would be more appropriate than a cell array: it depends on what data type is returned by YourFeatureExtractionCallGoesHere

Related Solutions

MATLAB: Sliced variables

To slice the variable 'a', you need to use a subscript list that contains:

One instance of the loop variable
Other subscripts which are either constant literal values or ':'

So, for example, in the following case, 'a' will be a sliced output:

parfor n = 1:35
  tmp = 90 * ones(1, 15);
  a(n, :) = tmp;
end

which creates 'a' as a 35x15 matrix with each element containing the value 90.

MATLAB: Binary Stream into Matlab

Why are you reading it into a column when you want a 2D array? You can read directly into a 2D array. Here's a snippet from an m-file of mine:

oneSlice = fread(fileHandle, [x_size y_size], '*uint8');

Ok, then you have a 2D array. Not sure what your difficulty with imshow() is. You can simply do

imshow(oneSlice); % or whatever your matrix is called.

Best Answer

Related Solutions

MATLAB: Sliced variables

MATLAB: Binary Stream into Matlab

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