accessing multiple images from multiple folders

i have multiple folders .Each folder contain multiple images. i want to perform some transformation on those images and once its finish , i want to save those transformed images in different folders inside the parent folder where my original images are. For example: right now i have something like this:data ->data-1 ->image1.jpeg, image2.jpeg. once i finish the operation on each images , i want to do save like data ->transformdata-1 ->transformimage1.jpeg, transformimage2.jpeg. Similarly for data-2, data-3 ..till data-57 folders.

Till now i am trying this code but it's not a complete answer. i guess it doesn't have way individually identify each folder and start creating new folder corresponding to the original folder :

function fileList = getAllFiles(dirName)

    dirData = dir(dirName);      %# Get the data for the current directory
    dirIndex = [dirData.isdir];  %# Find the index for directories
    fileList = {dirData(~dirIndex).name}';  %'# Get a list of the files
    if ~isempty(fileList)
      fileList = cellfun(@(x) fullfile(dirName,x),...  %# Prepend path to files
                         fileList,'UniformOutput',false);
    end
    subDirs = {dirData(dirIndex).name};  %# Get a list of the subdirectories
    validIndex = ~ismember(subDirs,{'.','..'});  %# Find index of subdirectories
                                                 %#   that are not '.' or '..'
    for iDir = find(validIndex)                  %# Loop over valid subdirectories
      nextDir = fullfile(dirName,subDirs{iDir});    %# Get the subdirectory path
      fileList = [fileList; getAllFiles(nextDir)];  %# Recursively call getAllFiles
      for k = 1:length(fileList) 
      x = fileList{k}; 
      imread(x);
      imshow(x);
      end
    end

end