Detecting fever and intoxication from video images and a baseline

A method for detecting fever, comprising:

• receiving, from first and second inward-facing head-mounted cameras (Cam1&2) sensitive to wavelengths below 1050 nanometer, images of respective first and second regions on a user's face;
• wherein middles of the first and second regions are at least 4 cm apart;
• calculating, based on baseline images captured with Cam1&2 while the user did not have a fever, a baseline pattern comprising values indicative of first and second baseline hemoglobin concentrations at the first and second regions, respectively;
• calculating, based on a current set of images captured with Cam1&2, a current pattern comprising values indicative of first and second current hemoglobin concentrations at the first and second regions, respectively;
• and
• detecting whether the user has a fever based on a deviation of the current pattern from the baseline pattern.

A system configured to detect alcohol intoxication, comprising:

• first and second inward-facing head-mounted cameras (Cam1&2), located less than 5 cm from a user's face, sensitive to wavelengths below 1050 nanometer, configured to capture images of respective first and second regions on the user's face;
• wherein middles of the first and second regions are at least 4 cm apart;
• and
• a computer configured to:
• calculate, based on baseline images captured with Cam1&2 while the user was sober, a baseline pattern comprising values indicative of first and second baseline hemoglobin concentrations at the first and second regions, respectively;
• calculate, based on a current set of images captured with Cam1&2, a current pattern comprising values indicative of first and second current hemoglobin concentrations at the first and second regions, respectively;
• and
• detect whether the user is intoxicated based on a deviation of the current pattern from the baseline pattern.