Store output program to a 3 d array as matrix

Asked by Aliff Zin on 31 Jan 2017

Latest activity Commented on by Aliff Zin on 1 Feb 2017

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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

3 Comments

Stephen Cobeldick on 31 Jan 2017

How is 10x12 a 3D array?

Truecolor images are already 3D, so you could concatenate them into a 4D array.

Jan on 31 Jan 2017

@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 on 31 Jan 2017

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.

1 Answer

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Answer by Niels on 1 Feb 2017

Edited by Niels on 1 Feb 2017

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

2 Comments

Aliff Zin on 1 Feb 2017

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

Aliff Zin on 1 Feb 2017

Sorry if my code seems wrong, i really really new to matlab. I need to get this done for my project. Thank you sir.

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