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<title>High-speed fingerprint verification using optical correlator</title>
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1998
Year
EngineeringMeasurementOptical TestingBiometricsEducationInformation ForensicsFingerprint AnalysisImage SensorImage AnalysisSoft BiometricsInstrumentationVision SensorMachine VisionVanderlugt-type Optical CorrelatorDecision ProcessInformation OpticComputer VisionSingle SlmEye TrackingOptical Information ProcessingOptical System AnalysisCamera TechnologyOptical Correlator
A real-time, VanderLugt-type optical correlator with a single SLM has been developed. A field programmable gate array was used to capture and process images obtained from a CCD camera at a rate of 60 video fields per second. During both enrollment and verification, a finger slides over a glass prism and is input to the system via the frustration of total internal reflection. An auto-enrollment procedure captures the optimal image during each slide. An optimal composite filter is implemented. The correlation detection process comprises real-time tracking of the correlation peak while the finger is sliding, and a decision process based on projective decision boundaries. Real-life tests yielded a false rejection rate of 1% and a false acceptance rate of 0.2%.