PIXEL 
NEIGHBORHOOD 
PIXEL 
CONNECTIVITY 
MAP 
TYPE 
Oil 
Exterior 
A 
0A1 
11000111 
Contour 
Oil 
Pixel 
111 
Interior 
B 
IBI 
01111111 
Pixel 
110 
000 
Arc 
C 
oco 
01000000 
Endpoint/ 
010 
Maxima 
000 
External 
D 
ODO 
11100000 
Contour 
111 
Maxima 
010 
Collapsing 
E 
0E0 
11000100 
Arc 
Oil 
111 
External 
F 
1F0 
00011110 
Contour 
000 
Minima 
110 
External 
G 
1G0 
00011100 
Contour 
000 
Minima 
111 
Hole 
H 
1H1 
10111111 
Maxima 
101 
10X 
Hole 
I 
1IX 
X01110XX 
Maxima 
10X 
001 
Hole 
J 
1J1 
10010011 
Minima 
001 
Figure 1. Bilevel Image 
478