Search International and National Patent Collections

1. (WO2018085945) SYSTEM AND METHOD FOR CAMERA-BASED HEART RATE TRACKING

Pub. No.:    WO/2018/085945    International Application No.:    PCT/CA2017/051354
Publication Date: Fri May 18 01:59:59 CEST 2018 International Filing Date: Wed Nov 15 00:59:59 CET 2017
IPC: A61B 5/024
A61B 5/026
A61B 5/1455
G16H 30/40
G06F 15/18
Applicants: NURALOGIX CORPORATION
Inventors: KABAKOV, Evgueni
LEE, Kang
LEVY, Phil
Title: SYSTEM AND METHOD FOR CAMERA-BASED HEART RATE TRACKING
Abstract:
A system and method for camera-based heart rate tracking. The method includes: determining bit values from a set of bitplanes in a captured image sequence that represent the HC changes; determining a facial blood flow data signal for each of a plurality of predetermined regions of interest (ROIs) of the subject captured by the images based on the HC changes; applying a band-pass filter of a passband approximating the heart rate to each of the blood flow data signals; applying a Hilbert transform to each of the blood flow data signals; adjusting the blood flow data signals from revolving phase-angles into linear phase segments; determining an instantaneous heart rate for each the blood flow data signals; applying a weighting to each of the instantaneous heart rates; and averaging the weighted instantaneous heart rates.