| 摘要 |
<p>PURPOSE:To structure a fully automatic detection system for a buried body by calculating parameters as to all closed areas and comparing them with a value based on the target buried body. CONSTITUTION:A 1st parameter P1, i.e. the ratio of the distance between the highest point and both right and left ends of a closed area on a horizontal axis and the width of the closed area measured from the highest point in parallel to a vertical axis is calculated. The coordinates of the picture elements at the highest position in the closed area are denoted as (Xt, Yt) and the X coordinates of the picture elements at the left and right ends in the closed area are denoted as Xmin and Xmax, Xt-Xmin and Xmax-Xt are calculated, and larger one is denoted as Wx. Then the width of the closed area measured from (Xt, Yt) in parallel to a Y axis is denoted as Wy and a feature parameter P1=Wy/Wx is calculated. When this parameter P1 is larger than a standard value, it can be estimated that this closed area is a closed area due to a reflected wave from the ground surface where a longitudinal / lateral ratio is extremely large in the lateral direction as shown by (b) in a figure. When the parameter is smaller than a standard value which is prepared, it can be decided that the closed area is a closed area due to a noise which is laterally large in longitudinal/ lateral ratio like C1 in the figure.</p> |
