APPARATUS AND METHOD FOR MEASURING BIOSIGNAL USING rPPG WITH FACIAL IMAGE NOISE REDUCTION

A method for measuring a biosignal based on remote photoplethysmography (rPPG), comprising:

• obtaining an image including a face of a user;
• recognizing a facial region of the user from the obtained image and dividing the facial region into a plurality of sub-regions according to a predetermined method;
• converting each of the sub-regions into a predetermined color coordinate system and calculating, for each of the sub-regions, an average value of a color component included in the predetermined color coordinate system;
• extracting a most frequent interval corresponding to an interval in which average values of the color component calculated for the respective sub-regions are most frequently distributed among predefined intervals;
• and
• extracting an image including sub-regions corresponding to the most frequent interval.

A non-transitory computer-readable storage medium storing instructions that, when executed by one or more processors, cause the one or more processors to:

• obtain an image including a face of a user;
• recognize a facial region of the user from the obtained image and dividing the facial region into a plurality of sub-regions according to a predetermined method;
• convert each of the sub-regions into a predetermined color coordinate system and calculating, for each of the sub-regions, an average value of a color component included in the predetermined color coordinate system;
• extract a most frequent interval corresponding to an interval in which average values of the color component calculated for the respective sub-regions are most frequently distributed among predefined intervals;
• and
• extract an image including sub-regions corresponding to the most frequent interval.