Store output program to a 3 d array as matrix

Question

Aliff Zin 2017-1-31

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https://ww2.mathworks.cn/matlabcentral/answers/322729-store-output-program-to-a-3-d-array-as-matrix

评论： Aliff Zin 2017-2-1

Sorry if i sounded stupid, i am new to matlab

I wanted to do experiment on fingervein system, i got 10 users with 12 images of each person, i have create all my pre processing step in my main function including the looping

but what i wanted to know is how do i save all the processesd image into array and concatenating them into one 3d matrix so my output will be 10x12. It is possible?

Thank you

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Jan 2017-1-31

@Aliff Zin: Please post more details, e.g. example data or existing code. I'm sure it is possible what you want, but I assume the answ3er "yes" will not make you happy.

Aliff Zin 2017-1-31

Hi, sorry if my question is not clear

I have main function where it runs HOG feature vector and i tested on 10 users with 12 fingers of each

So when i run my main code, it will automatically store the output of extracted features (3060) x 10(user) x 12 (image) from the looping in my main function.

I need to store it in 3 different arrays each. So that i can concatenate them to form a 3D matrix. So i can have a matrix size of 3060 x 10 x 12

Sorry if it is not clear. Thank you for your reply.

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Answer 1

Niels 2017-2-1

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https://ww2.mathworks.cn/matlabcentral/answers/322729-store-output-program-to-a-3-d-array-as-matrix#answer_252832

编辑：Niels 2017-2-1

在 MATLAB Online 中打开

A=cell(10,12);
for user=1:10
  for imageNumber= 1:12
      % for this to work you will need some way to get the right name
      % cant help any further without more information (like image names etc)
      A{user,imageNumber}=imread ("replace.png");        
  end
end

i think this might be kind of what you wanted

A{user,imageNumber} % will get you the data you want to access

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Aliff Zin 2017-2-1

在 MATLAB Online 中打开

This is my code after choose from the folder. (I currently have 10 files represent 10 users and 12 images of same size in each file) I include all the processing step in this code What i wanted is to store the hog feature length, total file of 10 (users), and 12 images in 3 different array and concatenating them as 3d matrix

So that my size will be 720 x 10 x 12. I need this matrix so that i can proceed with SVM. Thanks for you reply

if numberOfImageFiles >= 1
    
    for f = 1 : numberOfImageFiles
      fullFileName = fullfile(thisFolder, baseFileNames(f).name);
          %%PRE-Processing step%%%%
          imageArray = imread(fullFileName); 
          imageArray = imadjust(imageArray,stretchlim(imageArray),[]);
          imageArray = imresize(imageArray, 0.3);
          hog_feature_vector(imageArray); 
      fprintf('Now Processing image in %s\n', fullFileName); 
          imshow(imageArray);
          drawnow; 
      end
  else