US Patent Issued to Nippon Telegraph and Telephone on Aug. 19 for "Estimation device, estimation method, and estimation program" (Japanese Inventors)

ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,390,103, issued on Aug. 19, was assigned to Nippon Telegraph and Telephone Corp. (Tokyo).

"Estimation device, estimation method, and estimation program" was invented by Jumpei Yamashita (Musashino, Japan), Hidetaka Koya (Musashino, Japan) and Akira Kataoka (Musashino, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An estimation device includes processing circuitry configured to acquire a pupil diameter of a subject whose work performance is to be estimated at a time of work and a luminance of a gaze target of the subject, calculate a variation amount of the pupil diameter of the subject from time-series data of the pupil diameter of the subject, d...