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Figure 12 | Journal of Mathematics in Industry

Figure 12

From: Application of the topological derivative to post-processing infrared time-harmonic thermograms for defect detection

Figure 12

Topological derivative on \(\varGamma _{\mathrm{front}}\) combining three different lamp locations. Left: lamps linearly spaced along the z axis at a frequency of 2 Hz. Right: counterpart at 0.2 Hz. Combining different lamp locations is a great way to improve the reconstruction of several defects at the same time, but we still have to choose the adequate frequency

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