Finger vessel images (IMAGE) Optica Caption Researchers developed a new biometric approach that uses 3D images of finger veins. Shown are finger vessel images from eight different subjects, with colors that represent different depths. Credit Jun Xia, University at Buffalo, The State University of New York 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.