Analysis of Edge Detection in Bar Code Symbols: An Overview and Open Problems

Table 1

UPCA encodation patterns.

Number	Pattern
0	(3,2,1,1)
1	(2,2,2,1)
2	(2,1,2,2)
3	(1,4,1,1)
4	(1,1,3,2)
5	(1,2,3,1)
6	(1,1,1,4)
7	(1,3,1,2)
8	(1,2,1,3)
9	(3,1,1,2)