Photoplethysmogram Measurement Without Direct Skin-to-Sensor Contact Using an Adaptive Light Source Intensity Control.
Hyun Jae BaekGih Sung ChungKo Keun KimJung Soo KimKwang Suk ParkPublished in: IEEE Trans. Inf. Technol. Biomed. (2009)
Keyphrases
- light source
- light intensity
- shape from shading
- single image
- photometric stereo
- lighting conditions
- surface normals
- multiple images
- illumination conditions
- lambertian surface
- diffuse reflectance
- object surface
- specular highlights
- structured light
- specular reflection
- dynamic range
- surface orientation
- multiple light sources
- reflectance properties
- real objects
- image intensity
- cast shadows
- surface reflectance
- specular surfaces
- contact force
- color space
- input image
- high quality