STATISTICAL DETECTION OF DEFECTS IN RADIOGRAPHIC IMAGES OF WELDS

摘要

In this paper we investigate applicability of statistical techniques for defect detection in radiographic images of welds. The defect detection procedure consists in a statistical hypothesis testing using several nonparametric tests. A comparison of rules derived for image thresholding for a given level of false alarm is presented. In this work we consider longitudinal defects such as linear flaws similar to cracks. Numerical experiments with real and test data within MATLAB's abilities are performed.