Face (1 of 2) (IMAGE) Rice University Caption Doctors can monitor their patients' vital signs through video by analyzing subtle changes in skin color. New software by Rice University engineers improves the technique by keying on regions of the face to help compensate for different skin tones, changes in lighting and movement. Credit Mayank Kumar/Rice University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.