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Open Access. Powered by Scholars. Published by Universities.®

1993

Electrical and Electronics

Conference

Articles 1 - 2 of 2

Full-Text Articles in Physics

General Automated Flaw Detection Scheme For Nde X-Ray Images, Karl Ulmer, John P. Basart Jan 1993

General Automated Flaw Detection Scheme For Nde X-Ray Images, Karl Ulmer, John P. Basart

Review of Progress in Quantitative Nondestructive Evaluation

This paper presents an approach to automated flaw detection (AFD) in an arbitrary X-ray image. The intensities in the digitized radiographic image are modeled as piecewise-smooth surface functions corrupted by noise and flaws. It has been observed that radiographs generated for NDE purposes containing flaws also have a combination of three unwanted features; background trends, geometrical structures, and noise. These features inhibit the performance of automated flaw detection algorithms. The proposed general processing scheme reduces the unwanted features in such a way that candidate flaws within the image can be identified. The proposed scheme is robust and is applicable to ...


Transcatter X-Ray Technique For The Inspection Of Insulated, Oil-Carrying Pipelines, P.-S. Ong, W. L. Anderson, B. D. Cook, R. Subramanyan Jan 1993

Transcatter X-Ray Technique For The Inspection Of Insulated, Oil-Carrying Pipelines, P.-S. Ong, W. L. Anderson, B. D. Cook, R. Subramanyan

Review of Progress in Quantitative Nondestructive Evaluation

Pipelines are subjected to corrosion and require periodic inspection. These pipes are generally covered with an insulating material, that is contained within a metal jacket. The removal of the insulating material is costly, and can hazardous if asbestos is the material being removed. Because a large number of pipes need to be inspected, a cost effective technique for the characterization of corrosion under insulation is desirable.