(a-c) Optical parameter estimates and fluence estimates over wavelength. The reduced scattering coefficient and the effective attenuation coefficient of the medium vary with wavelength. The measurement SNR is 50 dB. (a) Shows estimates of using Model I and Model II, and (b) shows estimated using Model I. (c) Shows estimates at position using Model I and Model II. The markers ( and () indicate estimates using Model I and II, respectively. The dotted line denotes ground truth . (d) Shows the strength of association between ground truth and its estimate over the SNR range. The markers () and () indicate correlation coefficients using Model I and II, respectively.