Figure 4 | Scientific Reports

Figure 4

From: Global mapping of stratigraphy of an old-master painting using sparsity-based terahertz reflectometry

Figure 4

Typical THz reflected signals and the sparsity-based deconvolved signals. Figure 4(a1–a3) show examples of raw reflected signals (black) and signals reconstructed (brown) from the sparse-deconvolution and reference signals. Figure 4(b1–b3) show the corresponding sparsity-based deconvolution signals (red); Fig. 4(b1) also shows the deconvolved signal achieved by FWDD for comparison.

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