Chamfer Mask:
( 1,  0,  0,   4)
( 1,  1,  0,   6)
( 1,  1,  1,   7)
( 2,  1,  0,   9)
( 2,  1,  1,  10)

Computed Lut Mask:
( 1,  0,  0,   4)
( 1,  1,  0,   6)
( 1,  1,  1,   7)
( 2,  1,  0,   9)
( 2,  1,  1,  10)

Look-Up Table: values which differ from LMC (L = 200, R <= 791)
Lut[][    4 ] =     5     7     8    10    11 
Lut[][    6 ] =     9    10    11    14    15 
Lut[][    7 ] =    10                         
Lut[][    8 ] =    11                         
Lut[][    9 ] =          14    15             
Lut[][   12 ] =    15    17    18    20    21 
Lut[][   16 ] =    19