| 摘要 |
PROBLEM TO BE SOLVED: To exactly judge a map document. SOLUTION: 'Light brown pixels of a contour line' are judged by a color pixel of contour line judging part 11 and map pixels at the periphery of which many white pixels exist are judged by a white ground area judging part 12. A number '1' is outputted in the case of pixels judged as the 'right brown pixels of a contour line' by the color pixel of contour line judging part 11 and judged as white pixels by the white ground area judging part 12 by an AND gate 13, the map pixels are counted by a number of pixels counting part 14 and the document is finally judged as the map document in the case of a counted value > threshold thC by a following judging part 15. |
