You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither SPIE nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the SPIE website.
1 January 1999High-speed fingerprint verification using an optical correlator
A real-time, VanderLugt-type optical correlator using a single SLM is developed. A field programmable gate array is used to capture and process images obtained from a CCD camera at a rate of 60 video fields/s. During both enrollment and verification, a finger slides over a glass prism and is input to the system via the frustration of the total internal reflection process. An autoenrollment 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%.