ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,502,111, issued on Dec. 23, was assigned to EMMA HEALTHCARE Co. LTD (Seongnam-si, South Korea).

"Healthcare apparatus for calculating stress index" was invented by Ryanghee Sohn (Yongin-si, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "A healthcare apparatus includes a BCG sensor; a camera; and a processor configured: to detect a ROI) corresponding to the face from the color facial image; to convert the detected first color image into a black and white image to acquire a first black and white image; to convert the detected second color image into a black and white image to acquire a second black and white image; to apply the acquired first ...