| 摘要 |
PROBLEM TO BE SOLVED: To obtain the same inspection result regardless of image determination skill of an examiner even if density unevenness occurs in a perspective image of a pipe weld part.SOLUTION: When a radiation source is arranged on a central axis of a pipe having a reference weld part, a reference density profile in pipe outer circumferential direction is generated on the basis of a reference perspective image generated by a radiation detection medium. When the radiation source is arranged inside a pipe having a weld part to be inspected, a weld inspection density profile in the pipe outer circumferential direction is generated on the basis of a weld inspection perspective image generated by the radiation detection medium. On the basis of the reference density profile and the weld inspection density profile, density correction information for correcting density unevenness in the pipe outer circumferential direction of the weld inspection perspective image is calculated, to correct the weld inspection perspective image on the basis of the density correction information. |
