sigma=2.666667
mask_1st:
0.000000, 0.004804, 0.010163, 0.018190, 0.027199, 0.033180, 0.031310, 0.019284, 0.000000, -0.019284, -0.031310, -0.033180, -0.027199, -0.018190, -0.010163, -0.004804
mask_2nd:
0.000000, 0.003988, 0.006782, 0.009003, 0.008321, 0.002774, -0.006952, -0.016604, -0.020671, -0.016604, -0.006952, 0.002774, 0.008321, 0.009003, 0.006782, 0.003988

scale=8388608.000000
nMask_1st:
0, 40296, 85253, 152591, 228164, 278336, 262648, 161763, 0, -161763, -262648, -278336, -228164, -152591, -85253, -40296
nMask_2nd:
0, 33453, 56890, 75525, 69805, 23272, -58318, -139282, -173404, -139282, -58318, 23272, 69805, 75525, 56890, 33453