Three-dimensional image construction for non-destructive testing

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