Computer-implemented method and system for contact photoplethysmography (PPG)
AssigneeQompium
InventorsMatthieu Genicot, Amaury Vanvinckenroye, Kobe Leysen, Lars Grieten, Jo Van Der Auwera, Bieke Van Gorp
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Abstract
A computer-implemented method for contact photoplethysmography, abbreviated contact PPG, comprises obtaining during a time interval plural PPG signals for sub-regions of a lens or video frame; and combining the plural PPG signals to thereby obtain a multi-region PPG signal.
Claims17
A computer-implemented method for contact photoplethysmography, abbreviated contact PPG, comprising:
- obtaining during a time interval plural PPG signals for respective sub-regions of a lens or video frame, each sub-region of said sub-regions covering multiple pixels;
- assessing a quality of said PPG signals or portions thereof and detecting inversion of said PPG signals or portions thereof;
- reverting said PPG signals or portions of said PPG signals that are inverted;
- removing bad quality segments from said PPG signals;
- and
- combining good quality PPG signals or temporally corresponding good quality segments of said plural PPG signals, comprising non-inverted and reverted inverted PPG signals or segments, to thereby obtain a multi-region PPG signal.
A computer-implemented method for contact photoplethysmography, abbreviated contact PPG, comprising:
- obtaining during a time interval plural PPG signals for respective sub-regions of a lens or video frame, each sub-region of said sub-regions covering multiple pixels;
- combining said plural PPG signals to thereby obtain a multi-region PPG signal;
- and
- generating plural multi-region PPG signals similar to said multi-region PPG signal for respective colors from a color space.
A computer-implemented method for contact photoplethysmography, abbreviated contact PPG, comprising:
- obtaining during a time interval plural PPG signals for respective sub-regions of a lens or video frame, each sub-region of said sub-regions covering multiple pixels;
- combining said plural PPG signals to thereby obtain a multi-region PPG signal;
- and
- detecting peaks in said multi-region PPG signal, and thereto:
- detecting initial peaks in said multi-region PPG signal;
- windowing said initial peaks in said multi-region PPG signal to thereby generate windowed initial peaks;
- averaging said windowed initial peaks in said multi-region PPG signal to thereby generate a peak template;
- correlating said initial peaks with said peak template;
- maintaining initial peaks for which a correlation measure exceeds a correlation threshold as peaks;
- and
- dropping initial peaks for which said correlation measure does not exceed said correlation threshold.
Dependencies are inferred from the claim text.