Figure 19From: Application of the topological derivative to post-processing infrared time-harmonic thermograms for defect detectionReconstruction of the three defects for \(\lambda =0.3\) Left: perspective of the box-shaped defect. Center: perspective of the groove-shaped defect. Right: perspective of the spherical defect. The reconstructed defects do not depend highly on the choice of the value for λBack to article page