| abstract |
Described herein are systems and methods for detecting a physiological response based on facial skin color changes (FSCC) recognizable in images taken with an inward-facing head-mounted visible-light camera (VCAM in ). Some examples of physiological responses whose manifestation involves FSCC include emotional responses (which at times may be hidden to the naked eye), and physiological signals such as a heart rate, heart rate variability, and/or a breathing rate. In one embodiment, a system that detects a physiological response based on FSCC includes VCAM in that takes images of a region of interest (IM ROI ) on a user's face, which is illuminated by ambient light, and a computer that detects the physiological response based on FSCC recognizable in IM ROI . Optionally, the system includes an outward-facing head-mounted visible-light camera (VCAM out ) that takes images of the environment (IM ENV ), and the computer detects the physiological response also based on IM ENV . |