| 摘要 |
This invention provides a digital data reader comprising Y-axis inner line calculating means for calculating a plurality of Y-axis inner lines whose start points on an X-axis base line are determined by correcting the deviations of tilting angles with respect to the Y-axis inner lines and to the X-axis base line in comparison with Y-axis outer lines in a display area and with a tilting angle of a Y-axis base line with respect to the X-axis base line; X-axis inner line calculating means for calculating a plurality of X-axis inner lines whose start points on the Y-axis base line are determined by correcting the deviations of tilting angles withrespect to the X-axis inner lines and to the Y-axis base line in comparison with X-axis outer lines in the display area and with the tilting angle of the X-axis base line with respect to the Y-axis base line; mark area origin detecting means for determining a mark area origin by calculating the points of intersection of the Y-axis inner lines and the X-axis inner lines; and mark area calculating means for calculating the mark area on the basis of the mark area origin determined by the mark area origin detecting means. The reader of this invention can read accurately the data on ditigal recording sheet according to transformation of the display area due to contraction and expansion of the recording sheet. |
