Fig. 4.

EKF and WLSQ results obtained for experimental NIRS data collected from subject 3 (a) $\mathrm{\Delta }\mathrm{HbO}$ estimated using WLSQ and EKF (b) corresponding $\mathrm{\Delta }\mathrm{HbR}$ estimated using WLSQ and EKF; (c) EKF estimates of $\mathrm{\Delta }{\mathrm{DPF}}_{\lambda }$ at 690, 785, and 830 nm; (d) difference between WLSQ and EKF hemodynamic signals.