Three-dimensional image construction for non-destructive testing aided by fuzzy logic

In this paper, we propose a fuzzy inference based method to visualize three-dimensional (3-D) structure of a tube buried in a concrete. The nondestructive testing (NDT) with pulse-radar; which makes it possible to non-destructively unmask tubes in a concrete, is orle of the most remarkable techniques of NDT: However only expert can interpret the standard data. In our work we represent such expert's knowledge with fuzzy if-then rules. First the method estimates candidate points of a tube on the scanned data. Second 3-D links of the candidate points air constructed by inferring thf continuousness of the tube Thus, this method can extract the internal structure of the concrete. Our experimental result expressed the 3-D structure of tubes with high accuracy by comparing with the radiography result.