--- a
+++ b/util/adjustFormat.m
@@ -0,0 +1,28 @@
+function [imagesCellTrain, meanAll, imageSize] = adjustFormat(imagesCellTrain)
+
+% %compute image size
+% %image size must be a power of 2
+% im = imagesCellTrain{1};
+% closPow2 = pow2(floor(log2(size(im,1))));
+% imageSize = [closPow2 closPow2];
+
+meanAll = zeros(numel(imagesCellTrain), 1);
+
+for i = 1 : numel(imagesCellTrain)
+    
+    %load
+    im = imagesCellTrain{i};
+    
+    %cast
+    %im = double(im);
+    
+    %mean
+    meanAll(i) = mean2(im);
+    
+    %subtract mean
+    im = im - meanAll(i);
+    
+    %assign
+    imagesCellTrain{i} = im;
+    
+end %for i = 1 : numel(imagesCellTrain)
\ No newline at end of file