| 摘要 |
PURPOSE:To improve the reliability of an extracted segment by applying the statistic processing not only to the information obtained from a thin area on a line but to the information obtained from a broad area to extract the segment to a differential picture image. CONSTITUTION:A memory is first provided to store each of the 0th-2nd order moments to each minor area, the maximum and minimum values of the (x) coordinates, the maximum and minimum values of the (y) coordinates and the maximum and minimum values of the sloping direction of a density slope. Then the picture elements are scanned from the highest line to the lowest line as well as from the left end to the right end with an original picture image. Thus the size and the direction of the density slope are obtained with each picture element. When the size of the density slope exceeds a certain threshold level, a specific minor area to which the corresponding picture element belongs is decided in response to a range of angle difference between the direction of the slope of said picture element and the direction of the slope of each picture element in a minor area to which the picture element right above or at the exactly left of the picture element. |
