Chamfer Mask:
( 1,  0,   5)
( 1,  1,   7)

Computed Lut Mask:
( 1,  0,   5)
( 1,  1,   7)

Look-Up Table: values which differ from LMC (L = 500, R <= 2494)
Lut[][    5 ] =     6     8 
Lut[][    7 ] =    11    13 
Lut[][   10 ] =    13    15 
Lut[][   12 ] =    16    18 
Lut[][   14 ] =    18    20 
Lut[][   17 ] =    21    23 
Lut[][   19 ] =    23    25 
Lut[][   24 ] =    28    30