4G.P.Singh and S. Udpa. The role of digital signal processing in NDT. NDT International,June 1986, Volume 19, Issue 3, Pages 127-130.
5Warren T, Ni J W. An automated radiographic NDT system for weld inspection[J].NDT&E International, 1996, 29(3):150-159.
6Ziegler, M. A new method for belt condition diagnosis with early recognition on the early recognition of violent damages and on the automatic assessment of belt condition of steel wire conveyor belts[J]. VDI Berichte, 2006(1918): 15-29.
8OTSU N. A threshold selection method from gray-level histograms[-J~. IEEE Transactions on Systems, Man and Cybernetics, 1979,9 (1) .. 62-66.
9Chen C H, Pau L P, Wang P S. Handbook of pattern recognition and computer vision[M]. World Scientific, 2010.
10Haralick R M, Shanmugam K, Dinstein I H. Textural features for image classification[J]. Systems, Man and Cyber netics, IEEE Transactions on, 1973(6) .. 610-621.
