Figure 4
From: Diffuse terahertz spectroscopy in turbid media using a wavelet-based bimodality spectral analysis
Diffuse THz spectroscopy, (a-d) the bimodality spectra obtained using the diffuse extinction spectra and their MODWT detail vectors at the oblique detection angles including \(\theta _1=18^{\circ }\), \(\theta _2=36^{\circ }\), \(\theta _3=72^{\circ }\), and \(\theta _4=90^{\circ }\), (e-h) the ROC curves obtained for the identification of the region of \(\alpha\)-lactose using the diffuse extinction spectra and their MODWT detail vectors at each oblique detection angle, (i-l) similar to (e-h) for the identification of the region of PABA, (m-p) similar to (e-h) for the identification of the region of HDPE.
