FLUOROSCOPIC IMAGE DENSITY CORRECTION METHOD, NONDESTRUCTIVE INSPECTION METHOD, AND IMAGE PROCESSING APPARATUS

Title:

FLUOROSCOPIC IMAGE DENSITY CORRECTION METHOD, NONDESTRUCTIVE INSPECTION METHOD, AND IMAGE PROCESSING APPARATUS

Document Type and Number:

Japanese Patent JP2017015739

Kind Code:

A

Abstract:

PROBLEM TO BE SOLVED: To make it possible to obtain the same inspection result without the dependency on an inspector's image discerning skill level even if density irregularities occur in a fluoroscopic image of a weld of a pipe.SOLUTION: A reference density profile is generated based on a reference fluoroscopic image generated by detecting a radiation projected from a radiation source onto a reference pipe with a radiation detection medium. A weld inspection density profile is generated based on a weld inspection fluoroscopic image generated by detecting a radiation projected from the radiation source onto an inspection target pipe with the radiation detection medium. Density correction information for correcting density irregularities in the weld inspection fluoroscopic image is calculated based on the reference density profile and the weld inspection density profile, and the density irregularities in the weld inspection fluoroscopic image are then corrected based on the density correction information. The weld inspection density profile is generated by performing curve approximation on changes in density values of the weld inspection fluoroscopic image.SELECTED DRAWING: Figure 13

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Inventors:

NAGASHIMA MAKIKO
NARUKAWA YASUNORI

Application Number:

JP2016207710A

Publication Date:

January 19, 2017

Filing Date:

October 24, 2016

Export Citation:

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Assignee:

FUJIFILM CORP

International Classes:

G01N23/18; G01N23/04

Domestic Patent References:

JPS5019279B1	1975-07-05
JPH03209583A	1991-09-12
JPH0716152U	1995-03-17
JP2012047569A	2012-03-08
JPS62277542A	1987-12-02
JPS61274210A	1986-12-04

Foreign References:

US20030058991A1	2003-03-27
US20120201348A1	2012-08-09

Attorney, Agent or Firm:

Kenzo Matsuura

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