Fig. 4.

(a) Evolution of the estimated HRF by the tuned Kalman filter as a function of time and (b) GLM esimate of the HRF for the complete time series. This plot shows the estimation of the HRF for the channels augmented with a synthetic HRF for one of the subjects (visual cortex dataset). The solid lines in the figures are the mean for all channels for the real-time Kalman estimation (blue) and the mean for all channels /for the a posteriori estimation with the GLM (green). The semi transparent lines are the individual channel estimations for the Kalman (blue) and for the GLM (green). The red dashed curve is the ground truth, and the vertical black lines represent the stimulus onsets.