| 摘要 |
PURPOSE:To simplify processing and improve precision by regarding points where a contour line changes abruptly as singular points, calculating distances between singular points of a seal impression to be collated and a reference seal impression with regard to only singular points distributed at the circumference of the seal impression, and discriminates whether the seal impression is true. CONSTITUTION:A reader 50 which reads a code number printed on a check 1 and a camera device 3 which takes a picture of a seal impression on the check 1 are provided in the middle of a conveyance path for the check. The camera device 3 takes a picture of the seal impression to be collated and its binary- coded signal to a picture processor 4. The picture processor 4 regards the points where the contour line changes abruptly as singular points and collates couples of singular points of the objective seal impression and reference seal impression. In this case, distances between singular points are calculated with regard to only singular points distributed at the circumference, and the calculated data are used as truth/falsehook discriminati on dataon the seal impression. |
