Matlab Vectorisation with cell help

Hi, I'm new in matlab and facing some processing speed problem on the coding. So i had read and try to work with vectorisation and it didnt seem work, my example code is as below:

for i = 1:length_branch_point

branch_crop{i} = imcrop(I_resize,[ (branch_point_x(i)-3) (branch_point_y(i)-3) 6 6]);

branch_crop{i} = imresize(branch_crop{i}, [7 7]);

branch_lai{i} = mean2(branch_crop{i});

branch_lid{i} = std2(branch_crop{i});

end

where branch_point_x = [1 2 3] and branch_point_y = [3 4 5]

Can someone show me an example on how to vectorise the code above? Thanks in advance.