Figure 4.

The vertically-offset fourth-level DWT details coefficients, (a), are compared to the the same vertically-offset fourth-level MODWT details coefficients in (b). Each trace in (a,b) is calculated over a different frequency range, including $f=0.30–1.10$ THz in the purple traces, $f=0.31–1.11$ THz in the red traces, $f=0.32–1.12$ THz in the blue traces, and $f=0.33–1.13$ THz in the green traces. In (c,d) the amplitude of all DWT details coefficients are calculated over $f=0.3–1$ THz, (c), and $f=0.4–1.1$ THz, (b) for a decomposition level of $J=4$. In (e,f), the amplitude of all MODWT details coefficients are calculated over $f=0.3–1$ THz and $f=0.4–1.1$ THz, respectively, for a decomposition level of $J=4$. The horizontal white dashed lines separate the levels of decomposition. The details coefficients at each panel are min–max-normalized between zero and one.