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2- Movafeghi A., Kargarnovin M. H., Soltanian-Zadeh H., et al, 2005. “Flaw Detection Improvement of Digitized Radiographs by Morphological Transformations”, Insight - Nondestructive Testing and Condition Monitoring, Vol. 47, No. 10, pp. 625-630.
3- Buades, Coll, B., Morel, J.M., 2006. “A review of image denoising methods, with a new one", Multi-scale Modeling and Simulation, Vol. 4 (2), pp: 490-530. http://dx.doi.org/10.1137/ 040616024
4- Buades, A., Coll, B., Morel, J.M., 2005. “Non-local algorithm for image denoising", IEEE Computer Vision and Pattern Recognition 2005, Vol 2, pp: 60-65, http://dx.doi.org/10.1109/ CVPR.2005.38
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6- Huazhu Song; Zichun Ding; Cuicui Guo and Zhe Li, “Research on Combination Kernel Function of Support Vector Machine”, International Conference on Computer Science and Software Engineering, Volume:1, Pages: 838 –841, Dec. 2008.
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10- Lou, Y., Favaro, P., Soatto, S., 2008. Nonlocal similarity image filtering. Research Reports CAM (8–26).
11- ISO-14096-1, 2005, “Nondestructive testing – Qualification of radiographic film digitization systems – part 1: Definitions, qualitative measurements of image quality parameters, standard reference film and qualitative control”, the International Organization for Standardization
12- ISO 14096-2, 2005, “Nondestructive testing – Qualification of radiographic film digitization systems – part 2: Minimum requirement”, the International Organization for Standardization.
13- ISO-17636-1, 2013 Nondestructive testing of welds — Radiographic testing - Part 1: X- and gamma-ray techniques with film, the International Organization for Standardization
14- ISO-17636-2, 2013 Nondestructive testing of welds -- Radiographic testing - Part 2: X- and gamma-ray techniques with digital detectors, the International Organization for Standardization
15- ISO-19232-1, 2018, Nondestructive testing - Image quality of radiographs - Part 1: Determination of the image quality value using wire-type image quality indicators, the International Organization for Standardization
16- ISO-19232-5, 2018, Nondestructive testing - Image quality of radiographs - Part 5: Determination of the image unsharpness value using duplex wire-type image quality indicators, the International Organization for Standardization