| 摘要 |
PROBLEM TO BE SOLVED: To provide the feature value extracting method of paper sheets capable of stably extracting the feature value of the paper sheets by improving detecting precision without receiving the influence of deviation. SOLUTION: A boundary line being that of lightness/darkness is detected as the feature place of the paper sheets, the position of the detected feature place is compared with a reference value to calculate a deviation and the extracting position of the feature value is corrected by using the deviation. Concerning the boundary line, the difference of pixel values with the adjacent row of a specific column is calculated with respect to the pixel value of the column of the paper sheets and the boundary line is detected by using a row having the largest difference, Otherwise, the sum of pixel values is taken by the unit of the row of the paper sheets to calculate the difference of the total values between with the adjacent row to detect the boundary line by using the row having the largest difference between the total values. Furthermore, the extracting position of the feature value is corrected by deviating the position of the measuring section of feature desired to extract by the portion of the value of the calculated deviation based on the deviation. |
