Fig. 4.

Fitted parameters μ_a, ${\mu }_s^{\prime }$, αD_B and β from noise-free data for 125 media by (a) ME-DSCA and (b) MDME-DSCA. The noise-free data for ME-DSCA or MDME-DSCA was generated at the SD separation r = 0.65cm with exposure time T from 0.1 to 1ms with a step of 0.01ms, or at nine SD separations (r from 0.25 to 1.05cm with a step of 0.1cm) with 10 exposures (T from 0.1 to 1ms with a step of 0.1ms). Each marker represents one μ_a, i.e. square: μ_a = 0.04cm⁻¹, circle: μ_a = 0.07cm⁻¹, triangle: μ_a = 0.10cm⁻¹, diamond: μ_a = 0.13cm⁻¹, and cross: μ_a = 0.16cm⁻¹. Each color represents one ${\mu }_s^{\prime }$, i.e. black: ${\mu }_s^{\prime }$ = 4cm⁻¹, red: ${\mu }_s^{\prime }$ = 7cm⁻¹, blue: ${\mu }_s^{\prime }$ = 10cm⁻¹, dark cyan: ${\mu }_s^{\prime }$ = 13cm⁻¹, and magenta: ${\mu }_s^{\prime }$ = 16cm⁻¹. The same marker with different colors means the same μ_a with various ${\mu }_s^{\prime }$ values. The same color with different markers means the same ${\mu }_s^{\prime }$ with various μ_a values. For better observing the fitted parameters, we move the points slightly across the x-axis and αD_B increases from left to right for each μ_a or ${\mu }_s^{\prime }$.