Defects identifying of valuable artistic paintings by industrial radiography

• Published in: مجله علوم و فنون هسته‌ای Vol. 42; no. 4; pp. 9 - 18
• Main Authors: S. M. Ghyasi, E. Yahaghi, A. Movafeghi, J. A. Madrid Garcia
• Format: Journal Article
• Language: Persian
• Published: Nuclear Science and Technology Research Institute 01-12-2021
• Subjects: artistic painting; defect identifying; gabor filtering; image processing; industrial radiography
• ISSN: 1735-1871; 2676-5861
• DOI: 10.24200/nst.2021.1306

The significant defects in the artistic paints are rupture, scratches, and twisting, which are caused by variations in temperature, exposure to moisture, and erosion. Industrial radiography can detect the defect locations, which is a non-destructive test, can be carried out. In radiography testing (RT), the produced radiographs may suffer from some degree of blurriness and low contrast due to the inherent scattering of X-ray, geometric factors such as the size of the beam source, the thickness of the part, and the source to film distance (SFD). The diagnosis of the shapes and sizes of the damages is difficult in some cases. Image processing methods can be used as additional tools for enhancing image quality and more accessible interpretation. In the present study, a Gabor filter technique, based on wavelet analysis with an automatic threshold level, was used to reduce the fogginess of radiographs. The reconstructed images of the proposed algorithm have better contrast, and the defects and signs are more precise than the original image. This algorithm can help the restoration experts for repairing the artistic paintings.