Figure 3.

Heart and respiration rates determined by adaptive and non-adaptive Kalman filter with PPG and flow reference using the SE setting. Heart (top) and respiration (bottom) rates 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). The dotted gray lines indicate the starting frequencies of the heart and respiration rates defined in the setting at startup.

Foussier et al. BMC Medical Informatics and Decision Making 2014 14:37   doi:10.1186/1472-6947-14-37
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