m = 9;	% rows
n = 9;	% columns

% max intensity = 21
Intensity = [|
 2,  7,  2,  8,  3,  9,  3, 11,  3 |
11,  3, 13,  3,  1,  3,  1,  3,  1 |
 3,  1,  4,  1,  4,  1,  4,  1,  0 |
 1,  1,  2,  2,  2,  4,  2,  4,  2 |
 6,  2,  7,  2,  8,  3, 10,  3, 11 |
 3, 12,  3,  1,  3,  1,  3,  1,  3 |
 1,  3,  1,  4,  1,  4,  1,  4,  1 |
 0,  2,  1,  2,  3,  2,  4,  2,  5 |
 2,  7,  2,  8,  2,  9,  3, 10,  3
|];