PPG Pulse Detector
The pulse detector included in BioSigBrowser consists of two phases: firstly a linear filtering transformation and secondly an adaptive threshold operation. The filtering transformation accentuates the abrupt upward slopes of the PPG pulses avoiding the false detection of irregular pulses. For the second part, a time varying threshold gradually decreasing between detections is used. Further details of the algorithm can be found elsewhere [J. Lazaro et al.2014].