How can I concatenate a uint8 array in a for loop to form an image?

%%Grayscale Baboon Image 
I2 = imread('baboon.png');

%Splitting image into a cell array 
chunk_size2 = [16 16]; % your desired size of the chunks image is broken into

sc2 = sz2 ./ chunk_size2; % number of chunks in each dimension; must be integer

% split to chunk_size(1) by chunk_size(2) chunks

X2 = mat2cell(I2, chunk_size2(1) * ones(sc2(1),1), chunk_size2(2) *ones(sc2(2),1));

[r, c] = size(X2);

%Extracting LBP features for each cell and concatinating them into a
%histogram 

result = []; 
    for row = 1 : r    
        for col = 1 : c    

Z = cell2mat(X2(row, col));
[row_cell, col_cell] = size(Z);

               for rows = 2 : row_cell - 1 
                   for cols = 2 : col_cell - 1 

              centerPixel = Z(rows,cols);
              pixel7= Z(rows-1, cols-1) > centerPixel;  
              pixel6= Z(rows-1, cols) > centerPixel;   
              pixel5= Z(rows-1, cols+1) > centerPixel;  
              pixel4= Z(rows, cols+1) > centerPixel;     
              pixel3= Z(rows+1, cols+1) > centerPixel;    
              pixel2= Z(rows+1, cols) > centerPixel;      
              pixel1= Z(rows+1, cols-1) > centerPixel;     
              pixel0= Z(rows, cols-1) > centerPixel;    
              eightBitNumber = uint8(...
                  pixel7 * 2^7 + pixel6 * 2^6 + ...
                  pixel5 * 2^5 + pixel4 * 2^4 + ...
                  pixel3 * 2^3 + pixel2 * 2^2 + ...
                  pixel1 * 2 + pixel0);
              localBinaryPatternImage(rows, cols) = eightBitNumber; 
              result = [result  localBinaryPatternImage(rows,cols)];
                   end 
                end 
          end 
      end

localBinaryPatternImage results in a 15x15 unit8 image that represents the lbp features of the last cell in the cell array X2. The for loop is only giving the last 15x15 uint8 array of the last cell in the cell array X2. How can I concatenate all the localBinaryPatternImage 15x15 unit arrays of each cell to form the entire image?

Answer 1

[Image Analyst]

Just use the original image, I2. Don't even bother with using X2 or Z - there's no point.

[CharlesB]

I cannot as that is what is requested from me to split the image into cells then apply the lbp.

[Image Analyst]

You can make a 3-D array using cat(3,...)

if row == 1 && col == 1
    localBinaryPatternImage3D = localBinaryPatternImage;
else
    localBinaryPatternImage3D = cat(3, localBinaryPatternImage3D, localBinaryPatternImage);
end