Figure 6From: An adaptive Kalman filter approach for cardiorespiratory signal extraction and fusion of non-contacting sensors Internal states X f and X s determined by adaptive and non-adaptive Kalman filter with PPG and Flow Reference using the SE setting. Internal states X f (top) and X s (bottom) determined by adaptive (red) and non-adaptive (blue) Kalman filter with PPG and Flow Reference (gray) using the SE setting for subject 1 (left column) and 2 (right column).Back to article page