| 摘要 |
In a decoding section of a stacked barcode reader, the brightness values of multiple pixels configuring image data are used to calculate multiple line widths of the bars and the spaces of the stacked barcode. Based on the evaluation value of the frequency distribution of multiple line widths, a priority order of T-sequence is determined. According to this priority order, the T-sequence is measured and the code word corresponding to the T-sequence is obtained. With this, the priority order of the T-sequence is determined based on the evaluation value (such as the maximum value, variance, etc.) of the frequency distribution of the line widths of the bars and the spaces that configure the stacked barcode increasing reading performance of the barcode reader on a stacked barcode while reducing the number of errors in all the decoded code words, despite the level of the resolution of the image pickup optical system. |
