| 摘要 |
A system and methods for sensing and imaging a fingerprint surface using an optical sensing device. The fingerprint system utilizes an optical detector to capture light selectively reflected by the relief features of the fingerprint surface. A number of different methods for lighting and positioning the sensor are described to desirably enhance the contrast and clarity of the rendered image and to improve accuracy in discriminating between fingerprints. A color filter system is also described that is integrated into fingerprint sensor and improves the quality of the resultant fingerprint image. Furthermore, a live finger sensing apparatus is shown to prevent the use of non-living or artifice finger substitutes with the sensor.
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