Abstract
In this paper, a method to identify the geometrical shape and the location of the defect embedded in a concrete structure by processing the thermal image of the structural surface is presented. In the proposed method, a layer-by-layer inverse analysis using an inverse filter based on 2D Fourier transform is carried out to obtain the sharper image of the defect as well as the depth of the damaged layer. The effectiveness of the proposed technique has been examined both numerically and experimentally.
