Abstract

We present an analysis and demonstration of using laser-speckle contrast imaging (LSCI) as a sensing modality for presentation attack detection in biometric authentication systems. We provide the design of an experimental testbed for the quantitative characterization of LSCI and measurement results for optimization of the parameters of the active imaging testbed. LSCI has traditionally been used as a qualitative tool for identification of blood flow in dermal micro-vasculature for diagnosis of tissue health. We have built a laboratory phantom model, simulating blood flow beneath diffuse tissue to enable quantitative characterization of the performance of LSCI as a function of both target and imaging system parameters. Our first testbed configuration was an objective LSCI setup, detecting unfocused light on a focal plane array. In objective configuration, we characterized speckle size and speckle contrast as a function …

Date

May 2, 2019

Authors

Claire Sun, Arun Jagannathan, Jonathan L Habif, Mohamed Hussein, Leonidas Spinoulas, Wael Abd-Almageed

Conference

Smart Biomedical and Physiological Sensor Technology XVI

Volume

11020

Pages

38-46

Publisher

SPIE