Abstract

In this work proposes a technique to detect some types of defects based on the radiography method. Inspection tests include two categories, destructive and nondestructive. One of the nondestructive tests is radiographic test that is used to detect internal defect. In addition, the image processing methods are used to improve defect detection in the radiographic images. The watershed technique is one of the segmentation methods that used to analyze images based on needed information. The proposed method in this paper is combination threshold and multistage watershed technique that applies to detect some of welding defects such as lack of fusion, wormholes, incomplete filled groove, and incomplete penetration. Otsu’s threshold leads to an increase in the contrast of the image and then multistep watershed transformation used to detect discontinuities and defect welding.

中文翻译：

---

阈值和多步流域技术相结合的缺陷检测

摘要

在这项工作中，提出了一种基于射线照相法检测某些类型缺陷的技术。检验测试包括破坏性和非破坏性两类。无损检测之一是用于检测内部缺陷的射线照相检测。另外，图像处理方法用于改善放射线图像中的缺陷检测。分水岭技术是用于基于所需信息来分析图像的分割方法之一。本文提出的方法是结合阈值和多阶段分水岭技术，用于检测一些焊接缺陷，例如熔合不足，虫洞，不完全填充沟槽和不完全熔深。