Bar code demodulating method dependent on respective range of length ratios of measured character lengths of a current demodulating character and a preceding demodulating character

摘要

A bar code demodulating method includes a step of measuring lengths of successive characters of a bar code, a second step of obtaining a ratio of the length of a demodulating character which is to be demodulated and the length of a preceding, demodulated character and a third step of demodulating the demodulating character by mutually different first and second demodulation schemes, selected in accordance with the obtained length ratio falling within respective, and different, first and second predetermined ranges.