Title :
A 500 dpi 224/spl times/256-pixel single-chip fingerprint identification LSI with pixel-parallel image enhancement and rotation schemes
Author :
Shigematsu, S. ; Fujii, K. ; Morimura, H. ; Hatano, T. ; Nakanishi, M. ; Adachi, T. ; Ikeda, N. ; Shimamura, T. ; Machida, K. ; Okazaki, Y. ; Kyuragi, H.
Author_Institution :
NTT Lifestyle & Environ. Technol. Labs., Kanagawa, Japan
Abstract :
A 500-dpi 224×256-pixel single-chip fingerprint identification LSI adapts the sensing circuit to a finger and performs pixel-parallel image processing and rotation in a pixel array. A test chip achieves 2 ms 10 mW sensing, 41 ms 19.2 mW identification, and practical identification accuracy at 2.5 V, 5 MHz.
Keywords :
CMOS image sensors; arrays; fingerprint identification; image enhancement; image processing equipment; large scale integration; parallel processing; 0.25 micron; 10 mW; 19.2 mW; 2 ms; 2.5 V; 224 pixel; 256 pixel; 41 ms; 5 MHz; 57344 pixel; CMOS process; fingerprint image; fingerprint sensor; image processing; pixel circuit; pixel-parallel image enhancement scheme; pixel-parallel image rotation scheme; sensing circuit; single-chip fingerprint identification LSI; Capacitance; Circuits; Fingerprint recognition; Fingers; Image matching; Image processing; Image sensors; Large scale integration; Pixel; Sensor arrays;
Conference_Titel :
Solid-State Circuits Conference, 2002. Digest of Technical Papers. ISSCC. 2002 IEEE International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-7335-9
DOI :
10.1109/ISSCC.2002.993078
