CRACK DETECTION METHOD AND CRACK DETECTION PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a crack detection method and a crack detection program capable of highly accurately detecting a crack with a prescribed width or more with little labor.SOLUTION: A surface of a pavement is photographed to create a photographed image and an original image of the photographed image is duplicated to create a duplicate image. The duplicate image is moved in the x direction by a corresponding distance and superimposed on the original image. A crack 11 included in the original image, having same width as the corresponding direction and extending in the y direction is continued from a crack 21 of the duplicate image in the width direction so as to increase the width and be intensified. A crack 12 included in the original image, having a smaller width than the corresponding distance, and extending in the y direction has a gap formed from a crack 22 of the duplicate image so as not to be intensified. This configuration can effectively intensify the crack 11 with a prescribed width or more so as to facilitate the extraction.SELECTED DRAWING: Figure 1