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CMOS fingerprint sensor with automatic local contrast adjustment and pixel-parallel encoding logic

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5 Author(s)
Jung, S. ; Corp. Technol. Dept., Siemens AG, Munich, Germany ; Thewes, R. ; Scheiter, T. ; Goser, K.
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A CMOS fingerprint sensor is presented with a self-biasing automatic local contrast adjustment technique for image binarization realized with a passive capacitive network. Pixel-parallel cellular logic is embedded into the sensor array and extracts the characteristic features of the fingerprint image without any additional area consumption. This single-chip sensing and encoding system is suited for low-power and low-cost applications.

Published in:

VLSI Circuits, 1999. Digest of Technical Papers. 1999 Symposium on

Date of Conference:

17-19 June 1999

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