one to many matching in matlab

I have two folders. I want to find the hierarchicalCentroid of the first image in the folder1 and all the images in the folder 2,then calculate the dist_1_2 between the image in folder1 and each image in the folder2,then find the minimum distance and display it . Again calculate the hierarchicalCentroid of the second image in the folder1 and find the distance with each element in the second folder and calculate the minimum distance and so on.. I write one code,But it want some changes. please help me

Dataset='H:\mainproject\codes\letters_numbers';
Testset = 'H:\mainproject\codes\images\test\kk';
plotFlag = 1;
depth = 6;
DataSet      = cell([], 1);
 for i=1:length(dir(fullfile(Dataset,'*.bmp')))

       % Training set process
       k = dir(fullfile(Dataset,'*.bmp'));
       k = {k(~[k.isdir]).name};
       for j=1:length(k)
           tempImage       = imread(horzcat(Dataset,filesep,k{j}));
          imgInfo         = imfinfo(horzcat(Dataset,filesep,k{j}));
         DataSet{j}  = hierarchicalCentroid(tempImage,depth,plotFlag);

          %Feature = feature_extractor(image(j));
         % DataSet{j}   = imresize(hierarchicalCentroid(tempImage),[width height]);
       end
   end
   TestSet =  cell([], 1);
    for i=1:length(dir(fullfile(Testset,'*.bmp')))

       % Training set process
       k = dir(fullfile(Testset,'*.bmp'));
       k = {k(~[k.isdir]).name};
       for j=1:length(k)
          tempImage       = imread(horzcat(Testset,filesep,k{j}));
          imgInfo         = imfinfo(horzcat(Testset,filesep,k{j}));

        TestSet{j}   = hierarchicalCentroid(tempImage,depth,plotFlag);
       end
    end
  dist_1_2 = sum((DataSet{j} - TestSet{j}) .^ 2);