b1 = imread('stadium11-11.tif');
b1 = b1(1:440,:,:);
b2 = imread('stadium11-15.tif');
b2 = b2(1:440,:,:);
b3 = imread('stadium11-17.tif');
b3 = b3(1:440,:,:);
b4 = imread('stadium11-19.tif');
b4 = b4(1:440,:,:);
b5 = imread('stadium11-23.tif');
b5 = b5(1:440,:,:);
b6 = imread('stadium11-24.tif');
b6 = b6(1:440,:,:);
b7 = imread('stadium11-25.tif');
b7 = b7(1:440,:,:);
b8 = imread('stadium11-26.tif');
b8 = b8(1:440,:,:);
b9 = imread('stadium11-28.tif');
b9 = b9(1:440,:,:);
ba = imread('stadium11-29.tif');
ba = ba(1:440,:,:);
bt = double(b1) + double(b2);
bt = bt + double(b3);
bt = bt + double(b4);
bt = bt + double(b5);
bt = bt + double(b6);
bt = bt + double(b7);
bt = bt + double(b8);
bt = bt + double(b9);
bt = bt + double(ba);
bt = bt/10;