PROBLEM TO BE SOLVED: To generate a barcode capable of indicating larger amount of data by short barcode length and improve reading precision when reading the bar code.;SOLUTION: When conveying recording mediums in which barcode data is recorded at a predetermined position interval, the bar code data is detected, a sensor output value forming the bar code data and corresponding to a central position of each bar is compared with a predetermined threshold value, whether each bar is a white-colored pattern or a black-colored pattern is determined, and a data bar part included in the barcode data is decoded based on the results of determination.;COPYRIGHT: (C)2006,JPO&NCIPI
展开▼
