System and method for camera-based heart rate tracking
US10448847B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 2018 |
| Grant date | Oct 22, 2019 |
| Priority date | — |
| Expiry date | Oct 5, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30104
- WIPO fieldMedical technology
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.