Comparison of traditional and adaptive multi-scale products thresholding for enhancing the radiographs of welded objectEffat Yahaghi, Mahdi Mirzapour and Amir MovafeghiEur. Phys. J. Plus, 136 7 (2021) 744DOI: https://doi.org/10.1140/epjp/s13360-021-01733-0