| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a bar code reading apparatus for properly decoding a captured bar code image. <P>SOLUTION: The bar code reading apparatus is provided with: a scan data acquisition part 12 for acquiring concentration sequence data showing the sequence of concentration values in a bar code sequence direction from an image obtained by imaging a bar code; a bar width calculation part 13 for acquiring a position where the concentration value is a peak value from the acquired concentration sequence data, and for calculating the concentration mean value of a predetermined range in the concentration sequence data on the basis of the peak position for each peak position, and for calculating the width of the bar of the bar code and the width of a space between the bars on the basis of the mean concentration value; a bar determination part 14 for converting the bar code into a bit sequence on the basis of the calculated bar width and the calculated space between the bars; and a code extraction part 15 for extracting characters corresponding to the converted bit sequence. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
