The camera, as mentioned Fujitsu in its official website, to measure a person's face from the brightness variations of green light is absorbed due to the content and distribution of hemoglobin when blood flow to the face. Base, hemogolobin in the blood can absorb the emitted green.
"(Technology) does not require special hardware and can measure the average heart rate by just pointing the camera at a person's face for five seconds," said Fujitsu, Kawasaki, Japan, Monday (18/3).
