Fujifilm Corporation

Makiko Nagashima

Yasunori Narukawa

Kouji Yamaguchi

Yoshikazu Matsumoto

A reference density profile is generated in an outer circumference direction of a pipe having a reference welded portion on the basis of a reference fluoroscopic image generated from a radiation detection medium when a radiation source is disposed on a central axis of the pipe. A weld inspection density profile is generated in an outer circumference direction of a pipe having an inspection target welded portion on the basis of a weld inspection fluoroscopic image. On the basis of the reference density profile and the weld inspection density profile, density correction information is calculated. The density correction information is for correcting density irregularities in the weld inspection fluoroscopic image in the outer circumference direction of the pipe. On the basis of the density correction information, the density irregularities in the weld inspection fluoroscopic image arc corrected.

Fluoroscopic image density correction method, and image processing device

A reference density profile is generated in an outer circumference direction of a pipe having a reference welded portion on the basis of a reference fluoroscopic image generated from a radiation detection medium when a radiation source is disposed on a central axis of the pipe. A weld inspection density profile is generated in an outer circumference direction of a pipe having an inspection target welded portion on the basis of a weld inspection fluoroscopic image. On the basis of the reference density profile and the weld inspection density profile, density correction information is calculated. The density correction information is for correcting density irregularities in the weld inspection fluoroscopic image in the outer circumference direction of the pipe. On the basis of the density correction information, the density irregularities in the weld inspection fluoroscopic image are corrected.

Fluoroscopic image density correction method, non-destructive inspection method, and image processing device

A pipe thickness measuring deviceis provided, including a luminance profile obtaining unit obtaining luminance profiles of radiographic images of a pipe to be measured in a direction crossing the pipe, an outer diameter point detecting unit detecting outer diameter points of the pipe based on the obtained luminance profiles, a region setting unit setting a predetermined region inside two of the outer diameter points of the pipe detected by the outer diameter point detecting unit, and an inner diameter point detecting unit detecting inner diameter points of the pipe based on a luminance profile corresponding to the set predetermined region from among the luminance profiles obtained by the luminance profile obtaining unit.

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Tokyo, Japan

Makiko Nagashima