In: Proceedings IRE WESCON Convention Record, pp. There are two methods of radiographic testing to visualize welds and welding defects such as X-ray RT and Gamma rays RT, based on the radiation source. IEICE Trans. consistent with the content of the radiography images with hypothetical theory test. Industrial radiography is the oldest and most reliable non-destructive test method in the examination and two dimensional evaluation of weld defects. In the conventional method, the analysis is done exclusively by the X-ray inspector. Since, more than sixty percent of radiographic images in gas pipelines are not faulty but need to be separated in visual check, our designed system Welding processes can introduce contaminants and metallurgical defects into a component. H��Wێ�8}��ctؼS� ��lf��ME�mmܒ!��I�~�˘L�'�4�v�ȪbթSw��c�*����psw��b����Æ����a7w���������ت�H&�bu#�d�+�a^������B�W��� �4���P�+���]ܼ��d/_�}��� ,^�z��~�k��G���+���ŁI�Cq�b��k��}�������yt&K鹲"\ T�;c���u+��/��m�Xo�Ǿ[5�z`�Ɉd���Hƈ�c�����E`��>��Q�!��h��On��n�}��5��\A��$�K.LQ�Сܲ�c�z�dC]R�J[n��� 5���xh��ޛ��C9��ϑ@�{�24P����Eܹ�DA՘�!�#ت��R�:�#�k���XO&TŵG�%�eӭ�r�A{7�Fh� Abstract: X-ray radiography is one of the most used tech- niques in the Non Destructive Testing (NDT). Instead of using film, digital radiography displays the images of the weld’s interior on a computer screen. The proposed approach is tested on X-ray images used in industrial radiography. Volumetric defects and planar defects in the radiographic image are emphasized and extracted by separate methods to obtain a volumetric candidate defect image and a planar candidate defect image. applications for which the defects are well marked by only some changes in the graylevel or the form. In practical weld inspection of gas pipelines, more than sixty percent of radiographic images are not faulty, but need to be separated in visual check by a certified expert. Detection and Classification of Welding Defects on Radiographic Images The radiographic image processing is especially used to improve the image quality, making the analysis process easier, which consists of detecting and classifying defects on the film. Under-fill. Therefore, each segment of a radiographic weld image, which contains a defect, was extracted manually along the edges of welding bead from the raw image. Not logged in Radiographic Testing (RT) – This method of weld testing makes use of X-rays, produced by an X-ray tube, or gamma rays, produced by a radioactive isotope. 1 0 obj << /Type /Page /Parent 1204 0 R /Resources << /ColorSpace << /CS2 1209 0 R /CS3 1214 0 R >> /ExtGState << /GS2 1241 0 R /GS3 1242 0 R >> /Font << /C2_1 1230 0 R /TT3 1229 0 R /TT4 1210 0 R /TT5 1212 0 R >> /XObject << /Im4 4 0 R /Im5 5 0 R /Im6 6 0 R /Im7 7 0 R >> /ProcSet [ /PDF /Text /ImageB /ImageC ] >> /Contents 2 0 R /MediaBox [ 0 0 612 792 ] /CropBox [ 0 0 612 792 ] /Rotate 0 /StructParents 1 >> endobj 2 0 obj << /Filter /FlateDecode /Length 3 0 R >> stream In: Proceedings of the 8th European Conference on Non-Destructive Testing (ECNDT 2002), Barcelona, June 17-21 (2002), Vieira, et al. Weld Flaws A weld flaw is any indication on a weld that can compromise the quality of the weld. %PDF-1.4 %���� GRIMA database of X-ray images (GDXray) is used in this work for preparing the dataset. In practical weld inspection of gas pipelines, more than sixty percent of radiographic images are not faulty, but need to be separated in visual check by a certified expert. Usually, defects in the original X-ray image are low in number comparing with its background information, and mixed with noises coming from various processes in the formation of X-ray images. In the first stage, the image is processed for noise reduction, contrast enhancement, thresholding, and labeling. In: Proceedings of the Fifth IASTED International Conference on Signal Processing, Pattern Recognition, and Aplication, Innsbruck, Austria, pp.

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