REINFORCEMENT RANGE EXTRACTION DEVICE, REINFORCEMENT RANGE EXTRACTION METHOD, AND REINFORCEMENT RANGE EXTRACTION PROGRAM

摘要

PROBLEM TO BE SOLVED: To simply and accurately acquire information on reinforcement arrangement.;SOLUTION: In a reinforcement information acquisition system 1, a portable terminal 4 detects markers MK1 and MK2 from the whole image corresponding to a part of a background bar B (S901). Next, an image existing between the marker MK1 and the marker MK2 is cut out (S902). In the cut image, by detecting locations where the brightness of pixel is discontinued in a direction perpendicular to the axis direction of a reinforcement, edges serving as area boundary lines are extracted (S903). Then, from the extracted edges, unnecessary edges are removed (S904). Next, frequency distribution for brightness distribution of the image is created, and based on the frequency distribution, representative brightness values in three ranges of reinforcement, shadow and background are calculated, and using the representative brightness values, the range encircled by respective edges is determined as any of the three (S905). Furthermore, when among the determined ranges, two adjacent ranges sandwiching an edge are the same, the two ranges are integrated as one range (S906).;COPYRIGHT: (C)2013,JPO&INPIT