Abstract: On some complicated production lines, applications of the traditional LED based bar-code scanners are restricted, because of their unsatisfying recognition rate. While CCD cameras give high-resolution of bar-codes and with the advanced processing operators, they give better recognition results. This paper introduces the skills and applications using bar-code recognition operators in Halcon software, including the architecture of the procedure, the dimension, orientation, type, and check digit of the bar-code, and setting method for scan-lines. The methods to read the set parameters, and the application skills of the data structures such as the contour and the bar-code are also presented.

Key words: bar-code recognition, scan-line, check digit