Title :
CMOS fingerprint sensor with automatic local contrast adjustment and pixel-parallel encoding logic
Author :
Jung, S. ; Thewes, R. ; Scheiter, T. ; Goser, K. ; Weber, W.
Author_Institution :
Corp. Technol. Dept., Siemens AG, Munich, Germany
Abstract :
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.
Keywords :
CMOS image sensors; capacitive sensors; fingerprint identification; image enhancement; low-power electronics; CMOS fingerprint sensor; area consumption; automatic local contrast adjustment; image binarization; low-power applications; passive capacitive network; pixel-parallel cellular logic; pixel-parallel encoding logic; CMOS image sensors; CMOS logic circuits; Capacitive sensors; Feature extraction; Fingerprint recognition; Image sensors; Logic arrays; Pixel; Sensor arrays; Sensor phenomena and characterization;
Conference_Titel :
VLSI Circuits, 1999. Digest of Technical Papers. 1999 Symposium on
Conference_Location :
Kyoto, Japan
Print_ISBN :
4-930813-95-6
DOI :
10.1109/VLSIC.1999.797270
