Fig. 4
Absorption coefficient spectra from the values obtained using Eq. (1). Absorption coefficient spectra of epidermis–dermis, \(\mu_{a}^{epidermis}\) (\(\lambda\)) at varying combinations of V water (normal or dehydrated (Dehyd)) and V melanin (low or high) as well as absorption coefficient spectra of subcutaneous fat, \(\mu_{a}^{subcutaneous}\) (\(\lambda\)) at varying combinations of V water (normal or dehydrated)