바뀜

이동: 둘러보기, 검색

Research

34 바이트 제거됨, 2025년 1월 17일 (금) 01:32
Non-Contact Bio Signal Measurement
== Non-Contact Bio Signal Measurement ==
NowadaysIn recent years, since the rapid development of wearable devices has revolutionized the wearable device, field of bio signal measurement becomes easier , making it more accessible, efficient, and simpleruser-friendly. However, the wearable devices are require direct contact to person methodwith the patient, which can be uncomfortable for certain individuals. In this paperresearch, the nonwe present a vision-contact method to measure photoplethsmograph based system for estimating vital signs using remote photoplethysmography (PPGrPPG) and pulse oximetry using face image sequences. By using The rPPG technology enables the image sequences, user can measure bio-signals without sensors. First, subtle motion which heartbeat occurs detection of blood volume changes in video was amplified to get PPG using Eulerian motion magnification. From the video, the image was magnified frame by frame to see facial skin through a camera that captures light reflected from the slight difference of skin variation occurred by the blood flows. NextBy analyzing these changes, pulse oximetry was measured from comparing the rPPG can extract vital signs such as heart rate, breathing rate, blood oxygen saturated hemoglobin levels, blood pressure and oxygen unsaturated hemoglobin in even stress levels. Our system uses advanced signal processing and machine learning techniques to improve the blood. Two light sources in 765nm reliability and 880nm wavelength alternately illuminated user skin. Then mobile camera captured lights reflected from accuracy of the skinrPPG signal.
[[image:biosignal.jpg|1200px|center]]
[[image:Signal processing.png|1200px|center]]
== Stabilization of Aging Neurons Through Activation of Hippocampal BDNF by Optical Method ==
편집
45

둘러보기 메뉴